Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f5a5908a2d6b25…

MALICIOUS

PDF

46.8 KB Created: 2020-08-12 13:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19c68dcae8bd4d2074c8698b0f00c053 SHA-1: cfe2fe19ae5c18a584a39a0ffbbf89c91ac8c8e7 SHA-256: e3f5a5908a2d6b2556733447c85c7a784846b37068f9d21f9a2f321494dd3d1d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=atkins+40+diet+pdf', suggesting a lure to download further content. The presence of a link farm and a malicious redirector indicates a phishing or content-luring attack pattern.

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=atkins+40+diet+pdf
    • http://files.sanmarinogirlscouts.com/uploads/1/3/1/4/131453215/8875701.pdf
    • http://files.anchoredstudents.com/uploads/1/3/2/6/132695280/wefiwojezuxanakef.pdf
    • http://sapivepo.nickbrust.com/uploads/1/3/0/9/130969061/lififomoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5349/0074/files/ascaris_lumbricoides_ciclo_de_vida.pdf
    • https://cdn.shopify.com/s/files/1/0433/8348/8679/files/vebapupunataruzil.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/brecon_beacons_os_map.pdf
    • https://cdn.shopify.com/s/files/1/0450/3427/4966/files/puxamuvodofuxobevojiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/tititakudos.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/xisilipem.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/wibitaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/puvenixijosekorujelobod.pdf
    • https://cdn.shopify.com/s/files/1/0435/5584/8355/files/17427187365.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/dulupugukofanugorew.pdf
    • https://cdn.shopify.com/s/files/1/0436/2518/5442/files/jupugatirebokumeji.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/avon_brochure_september_2020_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/rakodoxagobo.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_off00006b58.bin
e77d2f0c74d3fe515d8bf63a6c0df47c725fb9a3965e39ab7c8ea8f3c5f12506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B58 4660 bytes
font_01_sfnt_off00007b45.bin
0d82fa1bbd46686c7b90f4798a86bcd49e4bf14f86351cff7feb82633b1558eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B45 10972 bytes
font_02_sfnt_off0000a088.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA088 4324 bytes

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