Malicious PDF — malware analysis report

Static analysis result for SHA-256 514c49951b8c787e…

MALICIOUS

PDF

50.5 KB Created: 2020-08-22 05:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfb0b73ed08e0908452557a66371b23b SHA-1: 6ade4bc0789ddc67706dd15fa8990996b9123602 SHA-256: 514c49951b8c787efd811267578e6db280c79f3b6d20d4edb49b899f90414b86
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links hosted on 'cdn.shopify.com', some of which are confirmed benign but others are unknown. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'handwriting without tears cheat sheet'. The presence of a malicious redirector suggests an attempt to lead the user to a site for phishing or malware delivery.

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.com/pify?keyword=handwriting+without+tears+cheat+sheet
    • http://files.maidtoshineservices.net/uploads/1/3/1/6/131637211/f24ce92d8e4506.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/96188849065.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/gigowenixikazepegidisug.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/american_accent_training_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0447/1826/0377/files/skyrim_nude_male_mod.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/market_share_simulation_allround_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/tajetutarezuwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/90689518724.pdf
    • https://cdn.shopify.com/s/files/1/0428/2155/0247/files/31813168538.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/ib_biology_study_guides.pdf
    • https://cdn.shopify.com/s/files/1/0436/3229/6089/files/28368420879.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/barreras_fisicas.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/gizenaregij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079e0.bin
88713728ebc6fc84c2a1b53dcc4f4864ff172caa195c213d46970a73d227b910
pdf-font-stream PDF embedded font (sfnt) at offset 0x79E0 5104 bytes
font_01_sfnt_off00008b39.bin
7bd7c427f0baf4486ebd2b02a44f74fa803d790c8d8cbc2df20270049e853aba
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B39 10292 bytes
font_02_sfnt_off0000ae78.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE78 4324 bytes