Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d80878e775cefd…

MALICIOUS

PDF

37.6 KB Created: 2020-08-21 01:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4966006298f059e0ed47535dbc5bad14 SHA-1: 33d3aab45188eb04e91144fc037d4e77646010fb SHA-256: e2d80878e775cefd18255f0369cc0744964aabe217399a8c8fd333dcd1357f62
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for educational content. The PDF_SEO_LINK_FARM heuristic suggests the PDF is part of a larger link farm, likely for SEO manipulation or to distribute malicious links.

Heuristics 3

  • 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.
  • 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=degree+of+monomials+worksheet
    • http://files.stpaullutheranph.com/uploads/1/3/1/3/131379042/vaxezowewaranukomiv.pdf
    • http://files.cnsbeauty.com/uploads/1/3/1/3/131379680/9125998.pdf
    • http://jadobesir.houseofblackart.com/uploads/1/3/1/4/131482975/f71996.pdf
    • https://cdn.shopify.com/s/files/1/0447/3149/8645/files/moxodapizarijexumuzene.pdf
    • https://cdn.shopify.com/s/files/1/0450/5636/0600/files/edgar_allan_poe_the_black_cat_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/amoeba_sisters_video_recap_of_cell_transport_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46456123156.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/circle_theorems_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/8097/3477/files/free_art_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0433/4315/1272/files/xewexugufuzemorawotudapaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/3052/5590/files/51280699804.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/sosowefizumebuzovakulubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/37486711360.pdf
    • https://cdn.shopify.com/s/files/1/0429/4311/9516/files/cerita_rakyat_jawa_timur.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_off00005598.bin
e0949220932e4a726a0015c93f2b4082a08701e50c0513dc7692453c361075ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5598 5336 bytes
font_01_sfnt_off000067ab.bin
11745bb8636c49cc86f456f1fc3b9d054e380f353b6d2cc14693936645d25aea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AB 10256 bytes

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