Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d0c27187bfe52e…

MALICIOUS

PDF

45.6 KB Created: 2020-09-01 09:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 837f42e044e202ac5a51aa601bd27c22 SHA-1: 5b7bb4359ef0dd9a9e1fce18e2b7e696dabe5a33 SHA-256: 91d0c27187bfe52e61d85e23b40025887c61d170c656a54a8e06d84dc12206b4
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. The document body, though garbled, contains keywords related to technical issues ('utorrent ing slow on windows 10') suggesting a lure to trick users into clicking the malicious link. The primary intent appears to be redirecting the user to malicious infrastructure.

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/wix?keyword=utorrent+ing+slow+on+windows+10
    • https://cdn.shopify.com/s/files/1/0435/6535/1071/files/95866001011.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/62644522914.pdf
    • https://cdn.shopify.com/s/files/1/0465/1316/0350/files/6659683704.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb85a69704e54eceb19bf28d159057f5.pdf
    • https://static.usrfiles.com/ugd/a01749_171a2a8d4c4e486f8d58a8b9f46facb9.pdf
    • https://static.usrfiles.com/ugd/2ac701_3851d9862b4c42cf9740610ef99e091a.pdf
    • https://static.usrfiles.com/ugd/b8c837_80a536615bd64cce9ba8fc579b7dd666.pdf
    • https://static.usrfiles.com/ugd/19ce5d_688ac087392c4b8e8ca7cceae991747a.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_975884b3c12049779090867173b06703.pdf
    • https://cdn.shopify.com/s/files/1/0462/9882/4864/files/balenciaga_song_punjabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/xezorofen.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/liraritigizo.pdf
    • https://cdn.shopify.com/s/files/1/0463/2962/6781/files/quran_sharif_with_bangla_translation.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/gasaxarelikerefona.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000519b.bin
57a47c9ea902b0a755e368f6f7b719bad563018fb3e2982589cc732aa03408e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x519B 4848 bytes
font_01_sfnt_off0000623a.bin
5e5d2d90c2a6c9114a0d0fdb62d2ffd23ed25b81268aeb87ff9f9e68da2fff75
pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 10236 bytes
font_02_sfnt_off00008565.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
pdf-font-stream PDF embedded font (sfnt) at offset 0x8565 16312 bytes
font_03_sfnt_off00009af0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF0 4324 bytes