Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9fd159ecb21cd7c…

MALICIOUS

PDF

46.0 KB Created: 2020-09-07 12:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe5f5ddf8ef9e2fbddc060528237628e SHA-1: 9df2eab23a595ce1bf1f5a86dc25760ead26b6c3 SHA-256: e9fd159ecb21cd7ccf00690aa3241fb2ad08e5bb3cb57c5069031258560a935e
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/pify?keyword=social+entrepreneurship+books+pdf'. The document body, though heavily obfuscated, contains a reference to this same URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com. The overall pattern suggests a phishing or redirection attempt disguised as a document.

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.club/pify?keyword=social+entrepreneurship+books+pdf
    • https://static.usrfiles.com/ugd/868f76_f90b3db1509e45739954d9dcaf6d88cd.pdf
    • https://static.usrfiles.com/ugd/921909_4d0b2e108f804739816a877951ed9342.pdf
    • https://static.usrfiles.com/ugd/2ca22b_cefdcb5c32fa4c5cb3fd6458469b91ca.pdf
    • https://static.usrfiles.com/ugd/b41a9a_c52040c14f0144ee82e65acaadf4dee6.pdf
    • https://static.usrfiles.com/ugd/738632_b50c5805e0794a4c929e73a4c95e7f8d.pdf
    • https://static.usrfiles.com/ugd/ee4d88_e070b1f1621d42faa3f06a992f203168.pdf
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/sesujexeniloju.pdf
    • https://cdn.shopify.com/s/files/1/0462/4384/0160/files/barbarian_assault_defender_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/6216/4644/files/half_lives_of_radioactive_isotopes_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5960/1830/files/vodapatoluzusikefozoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/4276/7001/files/87156685843.pdf
    • https://static.usrfiles.com/ugd/c3f59f_e6ae98d30c81408db8b381635db361e0.pdf
    • https://static.usrfiles.com/ugd/b1dabf_cf06958b92bd4d9fbcb5f6d9ea04b16e.pdf
    • https://static.usrfiles.com/ugd/599026_52a3fc745db04934850aec5f556f6669.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_off000074f7.bin
49f93de16fdc6f873d930b39c10b837c35aab4cd252f841f29beb8ccbe8147d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F7 5548 bytes
font_01_sfnt_off000087c6.bin
b220fd1836ef06fd8411f5b78943c4a9f07432e5e860671ae9dd745a399a95fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C6 10436 bytes

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