Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47bd6ea30f611c1…

MALICIOUS

PDF

60.8 KB Created: 2020-08-10 14:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccb98535e934e32f50aaddc547e5cefd SHA-1: 3b5d3b0e3e9d1bd77e855c0e8fb6e3a36013701f SHA-256: e47bd6ea30f611c15a975224696bde99b9434c3b14be45b0731889c7f350e426
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 for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=citizenship+and+civic+engagement+pdf, which is likely used to lure victims into downloading further malicious content or phishing for credentials. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=citizenship+and+civic+engagement+pdf
    • http://zajuzufur.captivatephoto.com/uploads/1/3/1/0/131070356/9915791.pdf
    • http://files.mellymeyer.com/uploads/1/3/1/0/131070178/velene.pdf
    • http://files.jmaunlimited.com/uploads/1/3/2/6/132681030/vitomogelipatovolar.pdf
    • http://files.towingservicesnearmelosangeles.com/uploads/1/3/1/4/131482892/02faec3bb82cb.pdf
    • http://files.davesartdimensions.com/uploads/1/3/1/6/131606348/vojetiborakupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/74594155390.pdf
    • https://cdn.shopify.com/s/files/1/0432/5264/6050/files/peptic_ulcer_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/3340/3285/files/gujutikarisiwoxujolepozek.pdf
    • https://cdn.shopify.com/s/files/1/0449/4727/5931/files/ya_hey_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/8197/4435/files/88900385013.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/lexutekedazafubub.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/sudufazexigibiboxuler.pdf
    • https://cdn.shopify.com/s/files/1/0430/7858/2439/files/unique_characteristics_of_services.pdf
    • https://cdn.shopify.com/s/files/1/0437/4993/3208/files/acquainted_with_the_night_poem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7592/8215/files/ar_nathair_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/zuduwugu.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_off0000af39.bin
ec160a8d714f70d7b851531bd7223ec236a27554748f8bf8b87a2686fe16f9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF39 5456 bytes
font_01_sfnt_off0000c1b8.bin
05faf3f27d2a36df1af2146d6344048959694bd716df542e15b71657e8e48c1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B8 10728 bytes

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