Malicious PDF — malware analysis report

Static analysis result for SHA-256 32504698c519fe03…

MALICIOUS

PDF

35.7 KB Created: 2020-08-10 17:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c6e2559ca292eb619c8304a9cd87af0 SHA-1: b0dbde58cbd7bc3b36229940098b48ab71c42258 SHA-256: 32504698c519fe032a8df3cb5a663a20652df1d1a25b0092a87fd24c0e622dde
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to host SEO-optimized PDF files. One prominent URL, 'https://ttraff.com/pify?keyword=magisterium+book+5+free+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure and embedded links strongly indicate a social engineering attack.

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=magisterium+book+5+free+pdf
    • http://files.confidentskier.com/uploads/1/3/0/7/130740517/sururov-dodeforoxixem.pdf
    • http://files.parishoflongpointbay.com/uploads/1/3/0/9/130969403/fivefinowubavonin.pdf
    • http://files.drawmakesnap.com/uploads/1/3/1/3/131384300/ca192.pdf
    • http://rixuz.thenewgrassroots.com/uploads/1/3/1/1/131163635/joxekedupug_vumupuruxawibo_wilepubimisiwak.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/daparurovebab.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/antipsychotics_classification.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/encyclopedia_judaica_1971.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/9596535741.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/xidumil.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/factors_affecting_mental_health.pdf
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/warhammer_40k_8th_space_marine_codex.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/93258282456.pdf
    • https://cdn.shopify.com/s/files/1/0437/6307/3181/files/1756149924.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/lan_topology.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/48461658765.pdf
    • https://cdn.shopify.com/s/files/1/0447/0479/2729/files/barron_s_gre_books.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_off00004b24.bin
12d69844b01eddf7714b679bdecab1284ed23c0fe67ea515c0ac50aa515e49d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B24 5660 bytes
font_01_sfnt_off00005e5b.bin
74c8770a0f5acb011f55007fd18a87166a73057b169a6f2d7862780696677446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5B 10176 bytes

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