Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac3e886cca68625…

MALICIOUS

PDF

113.9 KB Created: 2020-08-05 15:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e76da706880d833dc59396b35ce1d50d SHA-1: 0fce49a6501d9fd60e47833a8ca8acbefa4dc340 SHA-256: 7ac3e886cca68625b623d86132b606eeca8c854282147201c0fd15790636f578
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=thyroid+disease+in+pregnancy+rcog+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=thyroid+disease+in+pregnancy+rcog+pdf
    • http://farat.allthatdance-nj.com/uploads/1/3/2/6/132681501/bapuj_zekom_wulowu_risej.pdf
    • http://files.morethansoulfood.net/uploads/1/3/2/6/132696111/49c3cfa.pdf
    • http://files.lawyers4drs.com/uploads/1/3/0/7/130739204/lumaf.pdf
    • http://files.parksidefellowship.org/uploads/1/3/1/4/131482866/vuliviv-kubuwewitaru-zefofo.pdf
    • http://files.shilohchristianband.com/uploads/1/3/1/0/131069766/wivadote.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/49498676075.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/gimabade.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/puxavebo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/eclipsemp3._com_fit_clip_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8312/7201/files/sofepusabezipadiniwuwotuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/9352/2587/files/55306268887.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/bututagilisudorifosiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/osrs_icthlarin_s_little_helper.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/rizuwuxawesifewizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/37242769044.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_off000178f2.bin
3f8f08d0c5532757f0196a166e8001aaa0e94857281865adc3c1fbc50990f3a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x178F2 5436 bytes
font_01_sfnt_off00018b76.bin
d22bbb4ea45b6c90ba5ac53859173524d818efb79bef3d4f53989458d26bd2ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B76 15000 bytes

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