Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ce855aaad8c39b…

MALICIOUS

PDF

35.9 KB Created: 2020-08-12 18:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e3c812e9461d8f92c292370d2e9c984 SHA-1: 1078b4eb7ec4f8d56a88409592327f56900c1ce3 SHA-256: e6ce855aaad8c39b627df7d0a2479cf86f73ae7f410b5a74a9245681b339035d
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector link disguised as a free download for a medical examination PDF. The document body contains the malicious URL, confirming the lure. The presence of numerous links to Shopify domains suggests an attempt to blend malicious links with seemingly benign content, likely for SEO poisoning to attract victims.

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/wb?keyword=demyer%20neurologic%20examination%20pdf%20free%20download
    • http://files.allstudentsallstandards.org/uploads/1/3/1/4/131437599/robirusutifugitudid.pdf
    • http://files.mkquilts.com/uploads/1/3/1/4/131483019/e29292478e70.pdf
    • http://josijiwuf.raniyoung.com/uploads/1/3/0/7/130738721/bavala.pdf
    • http://bookgeek.top/?download=0071701176
    • https://cdn.shopify.com/s/files/1/0431/7957/3408/files/pdf_to_word_converter_online_without_email_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/zetisedigila.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/30844154497.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/43080827421.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/atm_machine_money_avaiable_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/wixufatarusadulaxegegeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/nojosasijuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/60398726797.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/lozebufebewo.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_off00004dec.bin
48ff90bec12d16dc4ed685a8e20b76e124de130b6422ae68de6b6808ea6da268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DEC 5560 bytes
font_01_sfnt_off000060db.bin
506b0980dfbe274851a2ab78ee290f5a993a8b4d31bb1651fdd7891c592eed40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 9948 bytes

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