Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f0fb5a0acc1831…

MALICIOUS

PDF

52.1 KB Created: 2020-09-04 13:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9ee0b98e3be9a5ffb8abbd43a4441a3 SHA-1: 5f2a650e32d43abcea9e78cf5e1540e7a3d4d6ca SHA-256: a6f0fb5a0acc18318c8def28b8c0b2633815b50ac9bbaedff2e52822563b443c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL. The combination of these factors strongly suggests a phishing or redirection attempt designed to lead users to malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=acg+guidelines+lower+gi+bleeding
    • https://static.usrfiles.com/ugd/b8c837_af3d921be24f4dfd8509b19225a31eba.pdf
    • https://static.usrfiles.com/ugd/b8c837_e970a08bb34040f18b03cb4b73bfd364.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e3cc7ffee334471b73d94ae21f8de02.pdf
    • https://static.usrfiles.com/ugd/455f95_73d0bfe169a142d69b3e036af9fb1d61.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_6960f716461f4e83a25e1f54b615b318.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/welax.pdf
    • https://cdn.shopify.com/s/files/1/0433/3279/6574/files/mapusafud.pdf
    • https://cdn.shopify.com/s/files/1/0434/6373/7510/files/100_carols_for_choirs_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1961/5904/files/andreas_gabalier_vergiss_mein_nicht.pdf
    • https://cdn.shopify.com/s/files/1/0432/0634/4868/files/at_t_mobile_hotspot_speed.pdf
    • https://cdn.shopify.com/s/files/1/0432/4917/2635/files/62051432509.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/41868757784.pdf
    • https://cdn.shopify.com/s/files/1/0435/8301/3023/files/nikon_d3000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/8673481818.pdf
    • https://cdn.shopify.com/s/files/1/0469/0273/9106/files/linkin_park_papercut_mp3_320kbps.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/
    • https://cdn.shopify.com/s/files/1/0432/4917/2635/files/620514

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f8a.bin
6465fe4f6b86d9e9c99d695e9973d9dd3bd222ba4072f659fc1fe3a27bb793fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8A 5120 bytes
font_01_sfnt_off00008115.bin
009bb3039a5f9fe202731e798a296f8d638267e7e42b6434db8126661710c1f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8115 14008 bytes
font_02_sfnt_off0000ad97.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD97 16204 bytes