Malicious PDF — malware analysis report

Static analysis result for SHA-256 310e7f1e842f0f00…

MALICIOUS

PDF

39.0 KB Created: 2020-08-14 17:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e062d1efc419599d342b2b7a6060a862 SHA-1: e0485cee1796617dde788a5df37d4ecd0ac5036d SHA-256: 310e7f1e842f0f005d403e86e5905ed7180c04165f21bb7a1e2c0fec1542c80b
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a link farm with numerous external PDF links, many hosted on cdn.shopify.com. The primary malicious URL identified is https://ttraff.cc/pify?keyword=levodopa+carbidopa+dosage+forms, which likely serves as a lure or initial stage for a broader attack. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=levodopa+carbidopa+dosage+forms
    • http://files.thebigfrack.com/uploads/1/3/0/7/130775221/tikawo_zajiv_vavepemuje_makemoxinifeme.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/berchemia_zeyheri.pdf
    • https://cdn.shopify.com/s/files/1/0434/9696/4261/files/14158085843.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/san_jose_marriott.pdf
    • https://cdn.shopify.com/s/files/1/0434/3100/2264/files/xinuxozeloravaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/vorotamagalekogedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6666/files/gibinosuwinutezosefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/81817548959.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_off00005a6c.bin
6e25b05c34ab4c22cba3d8e8dd817cb7f72c3b06c3ae25c167fa7f5eee7876fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6C 5584 bytes
font_01_sfnt_off00006d5c.bin
b897bcb043c5fed7a71057f1c28c67111b1dbe03e1a67c41d3d7bec39a086c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5C 10148 bytes

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