Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ad1727ee7d5566…

MALICIOUS

PDF

44.5 KB Created: 2020-08-14 15:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d0095559317684b2273164a7955d4a8 SHA-1: 14dc2b411c78a4ec9bcc951c1cf763ff8c5032c4 SHA-256: 22ad1727ee7d5566d5017f264ebe7e7d2245901d93658389ef844667573ccc9e
152 Risk Score

Malware Insights

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

The PDF 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 to external PDFs hosted on domains like cdn.shopify.com. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to lure the user into clicking the link. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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.com/pify?keyword=excel+macro+lookup+value+another+sheet
    • http://files.biodanzausa.com/uploads/1/3/1/4/131453645/rixozopomoga.pdf
    • http://files.bohemianmercantile.com/uploads/1/3/1/6/131606878/8ea1881f.pdf
    • http://files.delightingingodsword.com/uploads/1/3/1/0/131071117/gavok_vifiguxi_nodatapufeniza.pdf
    • http://files.pigandink.com/uploads/1/3/2/6/132696030/xedasot.pdf
    • http://files.pacificharpproject.com/uploads/1/3/1/1/131164250/gapuwoxeki.pdf
    • https://cdn.shopify.com/s/files/1/0434/7261/7637/files/3993472191.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/rawufopepawexujanala.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/nibiduzoforuruve.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/85970983856.pdf
    • https://cdn.shopify.com/s/files/1/0434/4545/2967/files/cattle_production_in_zimbabwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/mologomuwixoxesosumegerol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/9204711379.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/pewijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/56026183085.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0823/files/configuring_bgp_on_cisco_routers_v4._0.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5194/files/classification_of_antifungal_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/4873285439.pdf
    • https://cdn.shopify.com/s/files/1/0429/1438/1980/files/57292442360.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/62486980030.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_off00006e4e.bin
dc9a476a8da6506d7420c0c44eaed2e1b2fff65f45263bac4c749010a9d3d3dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4E 5320 bytes
font_01_sfnt_off00008037.bin
2b058b567d63da7bff24a61dddcbe01201c2c0b585dedb82616717c9532f0c22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8037 10632 bytes

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