Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d174685880b012d…

MALICIOUS

PDF

40.1 KB Created: 2020-08-26 22:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db8ef1249dc09e1b8985211ea7554ad2 SHA-1: 22cfe56f83d20e261aa5689459508776ccc4a387 SHA-256: 4d174685880b012d88b372cd098a0b19911887f8f2f2b85c9791a3641046bdfe
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/pify?keyword=mi+vecino+infernal', which is also present in the heuristics. This suggests the primary purpose is to redirect the user to malicious content. No scripts were extracted, limiting the analysis of further stages.

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/pify?keyword=mi+vecino+infernal
    • http://xitemazur.theaterfreunde-siders.ch/uploads/1/3/0/8/130814328/760692.pdf
    • http://rozito.ohscounseling.org/uploads/1/3/2/3/132303124/1821809.pdf
    • http://files.mrwingard.com/uploads/1/3/0/7/130738753/8802225.pdf
    • http://womuri.freecreatestudio.com/uploads/1/3/1/4/131406893/pajiraluzapudavisad.pdf
    • https://cdn.shopify.com/s/files/1/0428/3331/3958/files/opening_the_akashic_records.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/80526481042.pdf
    • https://cdn.shopify.com/s/files/1/0429/0795/9452/files/44583586198.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/xonexogivubutujuvulefo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/xevudetefizinubamemepidib.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/jipuzafuwedonibabegeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/q13_news_live.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/6219604230.pdf
    • https://cdn.shopify.com/s/files/1/0452/2046/2743/files/exercices_alphabtisation_adultes_franais.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/blackwing_lair_solo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/19976966281.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/despite_and_although_exercises.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eb1.bin
64f723fb4c21560846cb9b2ecb4a9fcb34c00a1828937082ea7a6dae98f64ddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB1 4764 bytes
font_01_sfnt_off00006efb.bin
7d18050afcb5b1adbf98998fc56f36fa14a9b13512597a09e4fc11b0b53e67eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFB 10752 bytes

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