Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8694dd29da2b0b1…

MALICIOUS

PDF

49.7 KB Created: 2020-08-12 03:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0ca6c095afe614db42ec942c68a8c89 SHA-1: df15de373d22d227235e01d41d1b56e385831ee9 SHA-256: f8694dd29da2b0b14f4c5e5d932b1c941743922bf56c55b959eba982025f5ecc
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=accounting+golden+rules+in+tamil+pdf
    • http://files.hartfordfederated.org/uploads/1/3/0/8/130874058/1889149.pdf
    • http://nikesisa.sammybeaugard.com/uploads/1/3/0/7/130739751/minut-pivis-jekezumet-topatu.pdf
    • http://wumativ.laylaazmigoushey.com/uploads/1/3/1/8/131856726/bexokojexiwopev-puveziwop-wezus-zuzafim.pdf
    • http://kajuladol.balancedespitethechaos.com/uploads/1/3/1/4/131453109/ca4ff1c23e90b37.pdf
    • http://files.biologywithkemper.com/uploads/1/3/1/3/131379312/zorebopuwatoboletole.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8077/files/42129527753.pdf
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/17389551731.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/28882040780.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4242/files/alcoois_e_fenois.pdf
    • https://cdn.shopify.com/s/files/1/0437/8515/8813/files/87969943323.pdf
    • https://cdn.shopify.com/s/files/1/0452/4412/1248/files/keto_diet_allowed_foods.pdf
    • https://cdn.shopify.com/s/files/1/0430/9290/2037/files/35374370375.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9162/files/15372223888.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2133/files/ribuzasimovin.pdf
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/tupiwidevugemagujofiwiko.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_off00006209.bin
fce05e2461507fad2f18eb87e28c904788f2f004589fb0f8086d6925bef53fbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6209 5344 bytes
font_01_sfnt_off00007411.bin
03959d08cabeb087440ac3378d81a634a64104584301e2b6913a5aa37f845739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7411 9932 bytes
font_02_sfnt_off00009638.bin
2a726e4d8e078a4a4a6a0bed67b139344cab8167eb027720faf42c08020076b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9638 16120 bytes
font_03_sfnt_off0000ab0c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0C 4324 bytes

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