Malicious PDF — malware analysis report

Static analysis result for SHA-256 849bce57f7feab7d…

MALICIOUS

PDF

84.7 KB Created: 2020-10-26 09:20:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1f0aa3960a792892633b8985350e8afd SHA-1: d7299f28e13103ccae8e2477d13172cb446d1e65 SHA-256: 849bce57f7feab7d1d0e7c44f7267256bac338ce627075a509cb5ec9ef351e8d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a link farm hosted on Weebly, suggesting an attempt to distribute malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is further obfuscated within the document body. The presence of a link farm and a malicious redirector indicates a phishing or malware distribution attempt, likely using a social engineering lure related to the document's apparent topic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/pify?keyword=gangguan+psikotik+lir+skizofrenia+akut+pdf In PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/e87ca91.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/pisitax.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/5a20fea885287.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/9eaf88c0f060294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5f91788b3f29f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f88ba4ea1e37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f95b9bfb9149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_5f95eb79dd208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f8d1417c1740.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9134e0e4-47cb-495e-9623-fbce85de46b7/danegowazaxidavudad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d8ccce-522d-40a6-aa18-00887fb280f8/44459998903.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/nopot.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/mergers_and_acquisitions_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/kotuwitev.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/que_es_desprendimiento_de_placenta.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/livro_antes_de_partir_em.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/vinilepe.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/cariotipo_del_raton.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/oxford_bookworms_library_stage_6_cry_freedom.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/lidofasosiso.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/23776641497.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE945 2084 bytes
SHA-256: 10cd2cb34f0411c129e140e967f0ac70eb5626ca18a3a3aacc1b8f49190da0f7
font_01_sfnt_off0000f2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 5236 bytes
SHA-256: c82140f61abb7ef06bf5b602b184b74e9bc4d1f9cf1f12aeb2171fe12c80bc96
font_02_sfnt_off000104d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D1 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_03_sfnt_off00011035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11035 11036 bytes
SHA-256: 495f00210ac034c3895fca1199ac97609518f986e6cf6c43daddce712d496a90
font_04_sfnt_off000135c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34