Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dccf14a07434c2e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-11 19:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bea35990a79d3901e99aec84a57aafb4 SHA-1: 02c40b337c2b7143b7d8526f987f466fb036f0c5 SHA-256: 8dccf14a07434c2e7755f07c1c07870b3c61fffc974e3366c076bea270a82753
128 Risk Score

Malware Insights

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

The PDF contains a deceptive call-to-action disguised as a 'bass guitar chord book pdf' download. This lure directs users to a malicious redirector URL, ttraff.com, which is likely part of a phishing or malware distribution chain. The presence of numerous external PDF links, many pointing to benign Shopify domains but some to unknown domains, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. The document body itself contains obfuscated text and embedded URLs, reinforcing the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=bass+guitar+chord+book+pdf
    • http://peruxi.newenglandsunroomrepair.com/uploads/1/3/0/7/130775934/jomekem_galun.pdf
    • http://files.mrburkholder.com/uploads/1/3/1/6/131606165/12493d891.pdf
    • http://files.mygabrielagarcia.com/uploads/1/3/2/7/132740260/xokopo.pdf
    • http://zutenez.jumpinrealestate.com/uploads/1/3/2/8/132814930/ropegel-xaremifofe-rupudonura.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/total_addressable_market_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/75795186482.pdf
    • https://cdn.shopify.com/s/files/1/0449/2269/9943/files/attestation_d_accueil_algerie.pdf
    • https://cdn.shopify.com/s/files/1/0430/2992/1943/files/16699993304.pdf
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/canon_kalimba_tab.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/git_clone_recursive.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/siroruragusofinogejovagos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/88116565886.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2028/files/kotilamov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/99425969244.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/98304613654.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/93302240056.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/zavapirorezufu.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_off00006217.bin
dbb2c970c916ce7c3171e0cc05c691ebb6222c1d2f18607215e2296e0a90426f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6217 5636 bytes
font_01_sfnt_off0000752e.bin
05e65f807f36eb77c4a22599d2451c5aab07e1e691c809a5e0bf2c66a2cf379e
pdf-font-stream PDF embedded font (sfnt) at offset 0x752E 10292 bytes