Malicious PDF — malware analysis report

Static analysis result for SHA-256 617a4d5e7c24563b…

MALICIOUS

PDF

58.3 KB Created: 2020-08-11 01:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d35807dcdb1e53aa4fd0b74b4a3d3ad2 SHA-1: b2f181af0fd002825415efc2db88f0740770c94f SHA-256: 617a4d5e7c24563be784d29905070baf2dcb27008454ee49f080b94cd53211e1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to redirect users to malicious content, likely for 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.com/pify?keyword=haunched+composite+beams+pdf
    • http://files.experiencebirthandbeyond.com/uploads/1/3/0/7/130738681/6875496.pdf
    • http://files.jtvisuals.net/uploads/1/3/1/1/131164093/a91b1185bcf8c95.pdf
    • http://pedil.alethearoygadbois.com/uploads/1/3/1/3/131384281/vapegoginexam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0446/7530/1539/files/pct_applicant_s_guide_national_phase.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/jelisofukejoluzasezewonox.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/algorithm_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3089/files/kirchhoff_s_current_law_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/vaxevemogaduwivejetan.pdf
    • https://cdn.shopify.com/s/files/1/0434/0308/3928/files/76080427393.pdf
    • https://cdn.shopify.com/s/files/1/0435/7272/3875/files/kambi_katha_malayalam_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/soguwiwuzoroleralolanuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/7862/2111/files/body_fitness_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/zenakufutegimerina.pdf
    • https://cdn.shopify.com/s/files/1/0429/2204/9695/files/pibuwirezinakesuwo.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_off00009608.bin
f5b5257b539de191676daeb72bbc4878b52d5fbd51e3164a148ee77f831dc5d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9608 5252 bytes
font_01_sfnt_off0000a7a9.bin
d7b442621d314d352cd6f55caf6933508164262c1c5b4e732d201a795fff99f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A9 11312 bytes
font_02_sfnt_off0000cdfb.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFB 4324 bytes

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