Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fff0ac36e3c7c8d…

MALICIOUS

PDF

44.0 KB Created: 2020-09-13 12:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29293adaba3117e4dee82ff42cee6bc3 SHA-1: 66e083490f772a2851524bbf2c58e70d5a01bc7b SHA-256: 1fff0ac36e3c7c8d439702c6c3f338d86f16bddd771db82802933a661db12ca9
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external links, indicating a link farm designed to lead users to malicious content. The document body, though partially corrupted, contains the URL 'https://ttraff.link/wix?keyword=tipos+de+lineas+de+produccion', which is also present in the heuristics as a malicious redirector. The ML classifier strongly supports the malicious verdict.

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.link/wix?keyword=tipos+de+lineas+de+produccion
    • http://gevodet.alissajacobscmt.com/uploads/1/3/1/4/131407552/853e6.pdf
    • http://files.saintmichaelscemetery.org/uploads/1/3/0/7/130739204/silawofagir_zarijimes_guxikitiwom.pdf
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdf
    • http://files.wrightwayretrievers.com/uploads/1/3/1/3/131383743/kijebakiwijin-rufakela-vokuzutex-tidebazejalodal.pdf
    • http://tebuteviv.karengilchrist.com/uploads/1/3/1/4/131438641/9684033.pdf
    • http://kasimar.partyhousesupplies.com/uploads/1/3/1/8/131872144/2711656.pdf
    • http://zilame.equicareplus.com/uploads/1/3/2/7/132740917/257788.pdf
    • http://files.uqpalaeo.com/uploads/1/3/1/0/131070938/c19d9ce5.pdf
    • http://files.uproarnationals.com/uploads/1/3/1/1/131164011/jigavevadibemij.pdf
    • http://files.michelleprocida.com/uploads/1/3/1/8/131856907/dimin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/tisatatezadizutonem.pdf
    • https://cdn.shopify.com/s/files/1/0433/1808/3742/files/8996904155.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/40638305489.pdf
    • https://static.usrfiles.com/ugd/6c032c_39397033b7ea4acfaf38a2b3c44a6840.pdf
    • https://static.usrfiles.com/ugd/badafb_f98851cc755b4ddfb5e9671a65fdcb48.pdf
    • https://static.usrfiles.com/ugd/3826db_8b985e6f27424ca18d6a5f7710b5384a.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_off00006065.bin
43b10c934061e286b12e9e8e0cc0cef622ad3dc089c75c26803477c7f2e84948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6065 4816 bytes
font_01_sfnt_off000070b4.bin
994fe1710b08f24ba3e0fa05fe013b78a9e399e28e3a949551406ba991ab698d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B4 10740 bytes
font_02_sfnt_off0000935b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x935B 4324 bytes

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