Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bc6d8f9491c8be…

MALICIOUS

PDF

53.6 KB Created: 2020-08-23 11:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6401da4516882bba68d962c98ef842a SHA-1: ddec6de5c355ee9d36047db24a7612291e401000 SHA-256: 78bc6d8f9491c8be9f1caa986f7373a73b1b80c7b71cb2eadc9ed049e411bb42
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a high likelihood of malicious intent, aiming to lure users to harmful sites. The ML classifier also strongly flagged this PDF as malicious. The document body itself is largely unreadable binary data, but the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=etre+anticonformiste+definition
    • http://files.snohomishvalleygolfcenter.com/uploads/1/3/0/7/130740522/dojefawexe-lupobujonef-damelukatod-tifujodo.pdf
    • http://files.adamhager.com/uploads/1/3/0/7/130740524/19bdbcc11b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/2952/6690/files/nekesonunakafezigok.pdf
    • https://cdn.shopify.com/s/files/1/0430/2694/0067/files/wakoxotefanotafinixakixeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/gipaposujibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/complete_guide_to_embroidery_stitches_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/gagazebelekikavavidafoxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/96315347798.pdf
    • https://cdn.shopify.com/s/files/1/0440/6935/5670/files/wukapasoleki.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/besanoruxifi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2421/0326/files/68160225879.pdf
    • https://cdn.shopify.com/s/files/1/0450/0199/8504/files/equivalent_fractions_and_decimals_worksheets_4th_grade.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081d0.bin
eb8c7d3101efb499f627e87200e342f50730cc81cf290879e8042cce66c0b914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D0 4880 bytes
font_01_sfnt_off0000923e.bin
7de2b59de7658715bdba55950d03c9e850f11967a725c2d74e3d73a2fe0cd580		 pdf-font-stream PDF embedded font (sfnt) at offset 0x923E 12580 bytes
font_02_sfnt_off0000b97b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB97B 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.