Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74cb229abf2cd2d…

MALICIOUS

PDF

38.0 KB Created: 2020-08-09 05:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce21201a6fba19aff32dd4ffbefc961 SHA-1: 30e32e08e83c6d9605842c5afac4cffd0a9ea0d2 SHA-256: e74cb229abf2cd2df35f7e85459511420593ef64d0857dadfcc4260c6bf4a506
152 Risk Score

Malware Insights

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

This PDF contains a large number of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=possessive+nouns+worksheet+pdf'. The document body, though partially corrupted, contains this same URL, indicating a deliberate attempt to direct users to potentially harmful content.

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=possessive+nouns+worksheet+pdf
    • http://files.mesabikerace.net/uploads/1/3/1/8/131858044/gafomuxe.pdf
    • http://bixuv.cupe2745.net/uploads/1/3/2/6/132695384/014b216b.pdf
    • http://files.livingabundantlyministries.org/uploads/1/3/1/4/131454808/vuloledu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4947/4453/files/spatial_reasoning_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/17315947814.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/lurabetiwenagubafu.pdf
    • https://cdn.shopify.com/s/files/1/0441/2263/6440/files/elizabeth_wurtzel_prozac_nation.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/taritufasanedego.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/dogobasurarixexifave.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0619/files/soya_beans_farming_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0435/5221/1099/files/6577384310.pdf
    • https://cdn.shopify.com/s/files/1/0440/9422/6584/files/41249046409.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/public_private_partnership_projects.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/ditufimazorevetiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/paziwimakepetuxudijeletud.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/14469206338.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_off00005703.bin
b726455451845b12826e0c673509d1385a3e68f841fd0e0b1953055121cbc0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5703 5104 bytes
font_01_sfnt_off00006879.bin
fb181648d0549c75ee7e72ebb401f273abcc875e4890ef51427b02503db74ee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6879 10192 bytes

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