Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce6fb0f247649f6…

MALICIOUS

PDF

45.8 KB Created: 2020-08-11 02:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 862682867ca70beefbebb34f5a5703f2 SHA-1: a6003b918806740fe9deef04e703c52c52cc3bbe SHA-256: 4ce6fb0f247649f6daade7c41adc31f02188b8fd0d6a4abc1b2ad4c518e5b306
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to `ttraff.com`, a known malicious redirector. The document body, though heavily obfuscated, contains the text 'analytical geometry grade 11 caps pdf' and the malicious URL, suggesting a lure to download potentially malicious content. The presence of a visual download button further supports this phishing pretext.

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=analytical+geometry+grade+11+caps+pdf
    • http://files.knightwoodtuition.com/uploads/1/3/1/6/131637631/7022d670932.pdf
    • http://vanag.amdarcyphotography.com/uploads/1/3/1/4/131453494/1426856.pdf
    • http://files.creativekco.com/uploads/1/3/0/8/130813736/tedeko.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/99758943334.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/47081021392.pdf
    • https://cdn.shopify.com/s/files/1/0432/2276/1635/files/91106635776.pdf
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/the_book_of_enoch_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/list_of_biology_scientists_and_their_discoveries.pdf
    • https://cdn.shopify.com/s/files/1/0438/5737/9488/files/personality_adjectives_word_search.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/22116998161.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/fiat_test_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0437/3112/4385/files/92843954164.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/9644474429.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/capriccio_24.pdf
    • https://cdn.shopify.com/s/files/1/0434/4784/5030/files/balanopostitis_tratamiento.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007444.bin
7dbfc58113dbb086ccde649376e3d178054523b97d533df2d649d7a19bddb5ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 5620 bytes
font_01_sfnt_off0000874c.bin
4e7b518ee50c0b00d38341d831b04488c5aa5fc509c1c77e0ec5603b41971cdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x874C 10256 bytes