Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4989a95926421b1…

MALICIOUS

PDF

50.3 KB Created: 2020-08-05 08:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e8840285863bb7950a6f61544d74d85 SHA-1: ea17b8b07b71dd8c07243a6fb6b6aa1b6d30a435 SHA-256: e4989a95926421b1bdd640ec96ff24eac9c493fcbf0e0ac0bd0e0cfacf998294
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to external PDFs, a common SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=africa+in+world+history+textbook+pdf'. The document body, though heavily obfuscated, contains references to the wkhtmltopdf tool and a date, suggesting it was programmatically generated. The presence of multiple PDF links and the redirector strongly indicate a malicious intent to drive traffic to harmful sites.

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.cc/pify?keyword=africa+in+world+history+textbook+pdf
    • http://files.bettylum.com/uploads/1/3/1/4/131452815/1254587.pdf
    • http://files.robinrgriffith.com/uploads/1/3/1/6/131606252/votiridalototi-zixav-wifapisunupupok.pdf
    • http://files.bravemansuitingco.com/uploads/1/3/2/7/132740327/6158b5d2ccc964d.pdf
    • http://files.pinewoodsaudubon.com/uploads/1/3/2/3/132302768/dc31e5827b6ee79.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1288/files/alphabetical_list_of_countries.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/najakaminafazazawolalaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0994/1415/files/66701802330.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/fotutokavanedokawuton.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/abdul_kalam_essay_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/45450325551.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/54314857303.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/68270733080.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/jomerid.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/22110072475.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/a_pocket_style_manual_diana_hacker.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_off000085d6.bin
44fbb85665787c9dd5b09a6580b73e459983768c62b7050a8aaa21ecd4b5d5f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x85D6 5700 bytes
font_01_sfnt_off00009949.bin
180a7b564fde194396b6da5764e9522ab5c8699ba3fbd768bf00b97e59a85e46
pdf-font-stream PDF embedded font (sfnt) at offset 0x9949 10168 bytes