Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3c8de00f2f7912…

MALICIOUS

PDF

49.7 KB Created: 2020-08-16 18:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd1dc78492bc9c550e2af0f542e46eba SHA-1: f331aaeb9fd9890a29ec213c0b0ac232421ea73d SHA-256: 7d3c8de00f2f79125c1e27a19341e6cd66c40367a3e830d1f6157da1979fe424
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL and appears to be an attempt at SEO poisoning or a phishing lure. The ML classifier also strongly indicated maliciousness.

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=full+form+of+rip+in+english
    • http://files.tyanawoodsphotography.com/uploads/1/3/0/7/130739393/6df54.pdf
    • http://files.wildponystudio.com/uploads/1/3/1/4/131408250/07b7478.pdf
    • http://sotogirid.earlysvilleexchange.org/uploads/1/3/1/3/131379732/1071632.pdf
    • http://files.evangelismfireministries.com/uploads/1/3/2/6/132695832/mewemobizakuxuw-jupulof-gosabexepobaze.pdf
    • http://files.phmiinfo.org/uploads/1/3/0/7/130739204/zudiji_paxizixem_zebajuti.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/19519340174.pdf
    • https://cdn.shopify.com/s/files/1/0430/1520/9123/files/rukejenewaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7624/files/48483136255.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/rumiparugiforudanazif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4583/files/69007411253.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/79430689543.pdf
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/lbdfx_fund_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/nemapulekaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3981/6861/files/kewaxurova.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1542/files/60081293569.pdf
    • https://cdn.shopify.com/s/files/1/0434/8539/7152/files/pobavodesamo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8159/files/6380503804.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/76145142605.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074fe.bin
562cc7e7522a518b0f686c962de9e41fd6c112d369ab95d2181e124b284e0695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FE 4864 bytes
font_01_sfnt_off00008556.bin
952f9a140a1939e2a0f7b3a336b76e35809977a8373da51fe96e715ed8d780a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8556 11164 bytes
font_02_sfnt_off0000aa41.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA41 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.