Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94b4ef98250a2a2…

MALICIOUS

PDF

50.1 KB Created: 2020-08-23 03:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 052e0562ef9f339a8d550434088061a2 SHA-1: 75d5fc37d4f864caad52caa99ac152abb783c721 SHA-256: f94b4ef98250a2a2d032bf35d80aaee3213fba0e0c4669f7d81f979c5aa203b1
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is presented to the user as a guide for 'Left 4 Dead 2', a social engineering lure. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used to improve SEO for malicious content. The document body, though heavily obfuscated, contains the malicious URL.

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=left+4+dead+2+realism+expert+guide
    • http://files.avastrategy.com/uploads/1/3/2/7/132741110/zaxuxanajikitalezebe.pdf
    • http://files.aleshahansonyoga.com/uploads/1/3/2/7/132741764/76382e35.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/bigamabulevorumol.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/29852504447.pdf
    • https://cdn.shopify.com/s/files/1/0440/5978/7414/files/cg_police_caf_waiting_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0446/6999/3123/files/gulag_archipelago_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0395/files/10235047363.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/15511742742.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/79997948602.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/87771253265.pdf
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/kexinewinopadogu.pdf
    • https://cdn.shopify.com/s/files/1/0447/7979/8679/files/los_ojos_verdes_gustavo_adolfo_becquer.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_off000085f6.bin
98fd6904f50f074cc71009503f6c74e20280bcf459752626f29d443efdceca2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F6 5592 bytes
font_01_sfnt_off000098f8.bin
12ecc624646247309a5f0f77cf7d214f3f3166de363aa4bcd4adb8314f606677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F8 10104 bytes

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