Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9672185e4b04134…

MALICIOUS

PDF

66.5 KB Created: 2020-08-10 17:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee8e36c8a1657bbc55b8944e97b0e0c8 SHA-1: 0bb9ea277d32af510546d1bc27f01e334e9d4093 SHA-256: b9672185e4b04134756c2714948817ab81ff7438ee227ebacddebaf0aa8895df
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body also contains this URL, along with numerous other links to PDF files hosted on Shopify and other domains, suggesting a link farm designed to obscure the malicious destination. A low-signal heuristic for a download button lure further supports the deceptive nature of the document. The primary malicious IOC is the redirector URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=list+of+synonyms+and+antonyms+pdf+download
    • http://files.avastrategy.com/uploads/1/3/2/7/132741110/zaxuxanajikitalezebe.pdf
    • http://files.debbieturnercounseling.com/uploads/1/3/2/6/132695629/6805287.pdf
    • http://files.theunlimiteddreamer.com/uploads/1/3/1/4/131438471/nitusuduke_powivedevo_juberuj.pdf
    • http://files.paramountrec.com/uploads/1/3/0/7/130775827/wanuvawofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/41307633175.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/preparing_for_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/gavitufimatilowejilunano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0446/8968/6681/files/mcdougal_littell_american_literature_grade_11.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/readypay_online_registration.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/cancionero_catlico.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3294478915.pdf
    • https://cdn.shopify.com/s/files/1/0431/0364/9954/files/xufodojiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29025511016.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/97121771884.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/panejomerudemonakukojil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/97207853462.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/99044497401.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa5e.bin
09ad307a94b05dd37c201f5e31d498e7d92881d3ac1e2d3514af907cfb669ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA5E 5224 bytes
font_01_sfnt_off0000bc29.bin
9406e2cc93791af603a57766cd2d25e508eb7bd160f728e9b95f795c80d8f1bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC29 10212 bytes
font_02_sfnt_off0000df1d.bin
b640af66e7284de6a830af9ba57da2a4f03ece048770df61bee8fb9fc288c3ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1D 8828 bytes

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