Malicious PDF — malware analysis report

Static analysis result for SHA-256 153fc40dd9db48cc…

MALICIOUS

PDF

45.7 KB Created: 2020-08-27 22:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3882f1bfb5898ca7fc9c02ff30b89cb0 SHA-1: ac5134aaf9c977b98e1bc46520085016cd6f8381 SHA-256: 153fc40dd9db48ccaf07bdafb6e9d75788bd526588f397d14d3ab5c90abc691f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious link, 'https://ttraff.cc/pify?keyword=del+fusible+mazda+3+2008+interior+lo', suggests a redirection to potentially harmful content. While no scripts were directly extracted, the nature of the links and the ML classification indicate a malicious intent, likely related to phishing or malware distribution.

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=del+fusible+mazda+3+2008+interior+lo
    • http://files.bridgeyoungadults.com/uploads/1/3/2/7/132710697/1a404390f738.pdf
    • http://files.kiddoscatering.com/uploads/1/3/2/8/132814096/vojes-rituzijiwerofi-feboti.pdf
    • http://files.louandlila.com/uploads/1/3/0/7/130739856/rotogugomurawavoxaz.pdf
    • http://peneb.psychlab.net/uploads/1/3/1/4/131453870/5262127.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/goposaguruwisaremubinaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/soredixujetojimegewi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/evermotion_exterior_archmodels_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5116/files/cartoon_character_design.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/87218489971.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/bapowakoramunobonudipiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/bukolapexigavakefabizi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/batokaxix.pdf
    • https://cdn.shopify.com/s/files/1/0448/9166/8647/files/361618669.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000618a.bin
edbb471eea9e1ac416f788df8f930d5de060aed8ee57f8293132abf3129113ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x618A 5756 bytes
font_01_sfnt_off000074fd.bin
0d3f0523e3530985046177ec142dc8f74b36d2211ce751c9d18a6ee47de4f0e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FD 12020 bytes
font_02_sfnt_off00009be2.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE2 4324 bytes

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