Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9daa69424d048b…

MALICIOUS

PDF

57.4 KB Created: 2020-08-25 07:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd2e5aa2410d2851f66e54b9f5f29db8 SHA-1: 13b793f687c842c554817b246bec5c94f125ef6b SHA-256: aa9daa69424d048b067ddff937b13a9f22af43908cd5b72705d7810179e3d13a
152 Risk Score

Malware Insights

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

The PDF was flagged by a malicious classifier and contains a large number of embedded links, many of which point to a link farm. One of the primary links, 'https://ttraff.com/pify?keyword=already+by+beyonce+and+shatta+wale', is identified as a known malicious redirector. The document body contains text related to this URL, suggesting a lure to entice users to click the malicious links.

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=already+by+beyonce+and+shatta+wale
    • http://tirojo.nutrition-girl.com/uploads/1/3/1/3/131383900/vigexewumuga_xejexasifofa_bikale_buvejaxolemoge.pdf
    • http://zorajefek.freshenitup.org/uploads/1/3/1/6/131636655/7442652.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/8512922810.pdf
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/vunafunatexijaligupawew.pdf
    • https://cdn.shopify.com/s/files/1/0433/3522/1403/files/nba_teams_names.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/65432915867.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/prevalence_of_gestational_diabetes_mellitus.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/stewart_calculus_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/the_national_interest_in_international_relations_theory_scott_burchill.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/26900997963.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/16729841000.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cb7.bin
46c6ad6f5141016dd22db0e8b34242e49ef9b3ba32fdcc6cce8b0ed0ca66b897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB7 6872 bytes
font_01_sfnt_off00006e0d.bin
a2a799ce2b0b5ab31c7d4d505f9df620226b876b5a809a871ff370175d692a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0D 5352 bytes
font_02_sfnt_off00008036.bin
c16475d6647fef86f330377503a124e3260ff3496e63d7a128f689530eee7d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8036 11524 bytes
font_03_sfnt_off00009bb3.bin
5d958b343f047ee2c127f2964caf097ba133bd1f36bea70d41aae3026f6e0f5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB3 10704 bytes
font_04_sfnt_off0000c097.bin
72b7bf7dadd2b26e29884f883b7a62650a2b85a6e7bd85938e5dd47c4a44031e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC097 16760 bytes

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