Malicious PDF — malware analysis report

Static analysis result for SHA-256 d109db044da09f1d…

MALICIOUS

PDF

39.8 KB Created: 2020-08-30 07:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4558864f9809e216469a97157520223 SHA-1: 4a043bd126942faf7934d67ca2a85ead9c707844 SHA-256: d109db044da09f1dded5e0b07a0138c29d22958ed17ced005f11d2d3736fcc9a
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, ttraff.me, which is flagged as malicious. This redirector is likely used to distribute further malicious content or phishing pages. The document body, though heavily obfuscated, contains the same malicious URL and a large number of other URLs pointing to PDF files, suggesting a link farm or SEO poisoning tactic to attract users searching for free books.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=reddit+download+free+books
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/58388451331.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/sogaraguzabuvim.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/mojobusumubedifabapajowe.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/dadodizojafaxano.pdf
    • https://cdn.shopify.com/s/files/1/0431/9916/8673/files/xelevasax.pdf
    • https://cdn.shopify.com/s/files/1/0447/0882/3193/files/wudixuj.pdf
    • https://static.usrfiles.com/ugd/b7082a_50cc17281e5f4aa9916cbe8342cd2bc6.pdf
    • https://static.usrfiles.com/ugd/7c3584_4bab70281cbb4ead9ca759dd619b11b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf9afa210ccd4576ace0f8eb31f8251d.pdf
    • https://static.usrfiles.com/ugd/a1fb72_dec515e0f49d4dafb488395b601e5641.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5009b7e0648479da9d0f5f178712a56.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb6fca7f18444a6a859001c0166b6698.pdf
    • https://static.usrfiles.com/ugd/1c90dc_f240cd056d7a4b37b5bfc66a8926f4e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c89056227e6f45a3a5d8eed9a9e47951.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_db23162b14c54612a1e92a2b101ae184.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa498cbccd3f411cb42edd933d93e5fa.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_off00005cf4.bin
1635f2e7d521887a20b5c84d64f23657f6cb19790b2e16205eddcfd916035837
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF4 5204 bytes
font_01_sfnt_off00006ecf.bin
94170d17538a0884bc8497a28a1e57598472c17c881a72a5e32928b334637a21
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECF 10688 bytes