Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b276ef959c9835…

MALICIOUS

PDF

35.9 KB Created: 2020-10-28 23:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f700149b21538aa8a453eecd17206aac SHA-1: 61e5eee0e21d97e9de49fc0e3538e10e8ea3c07f SHA-256: 12b276ef959c983585122e3b137ed8cf942ce6bec0283ef1e7bcffa7f7d17d02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.me/123?keyword=way+to+read+quran'. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the same URLs, reinforcing the finding of a link-based attack.

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.me/123?keyword=way+to+read+quran
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/tifova-bivakomipebeki-sikuxarawonoxiw-betok.pdf
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/2ea214a423.pdf
    • https://lonodoxelu.weebly.com/uploads/1/3/4/3/134305804/fonemipodulexek-duwimi.pdf
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/wujadakisobut_kelezu_vorewofevul_sibenofavitigig.pdf
    • https://cdn-cms.f-static.net/uploads/4408343/normal_5f9313d33d8bf.pdf
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/laketozoxulujekivup.pdf
    • https://cdn-cms.f-static.net/uploads/4415935/normal_5f9750460f925.pdf
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/gotagulojivaga-pebetidubo-gonurojirupuru-gumesegekubixis.pdf
    • https://xijuxesipokufi.weebly.com/uploads/1/3/4/0/134042605/5661685.pdf
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/lofimozoji-dokixozevovigim-worudapovujat-daxusega.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sasufufa/38536215330.pdf
    • https://s3.amazonaws.com/gadumagabusodel/wigalaka.pdf
    • https://s3.amazonaws.com/vabedafozo/apics_cpim_exam_content_manual.pdf
    • https://cdn.shopify.com/s/files/1/0505/9100/6888/files/led_light_gloves.pdf
    • https://cdn.shopify.com/s/files/1/0499/3915/3054/files/falls_lake_nc_cabin_rentals.pdf
    • https://cdn.shopify.com/s/files/1/0479/6694/5447/files/62381949740.pdf
    • https://uploads.strikinglycdn.com/files/75d998d6-0364-4d85-9631-121e611781bc/84456865402.pdf
    • https://uploads.strikinglycdn.com/files/f6086865-03e7-4c0a-a497-755108587cb0/9136168695.pdf
    • https://s3.amazonaws.com/panalipolifod/disorder_of_respiratory_system.pdf
    • https://cdn.shopify.com/s/files/1/0499/8365/1990/files/keyboarding_practice_sheets.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005161.bin
7fd27c2a780ddc4ec3f270f32fc3caab9c3f6f9e607bf91440664814e774e690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5161 4848 bytes
font_01_sfnt_off00006201.bin
f8facf9758666babae8c9a4f8a7bf0a6cd53498fbb7f6f2f00818a8854098ed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6201 9480 bytes

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