Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ff4ea166623fc1…

MALICIOUS

PDF

48.6 KB Created: 2020-08-10 21:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96f8b3412329254fd5ff9276dc51b910 SHA-1: 6c2db816544d03651ac508656fdfa55616b6090d SHA-256: 69ff4ea166623fc15457b599c73896caa2a31ecf202723eb3391f46e1966de3a
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a redirector service. The presence of a link farm and a malicious redirector strongly suggests an attempt to lead the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=anglican+church+of+southern+africa+lectionary+2020+pdf
    • http://siwives.hublerfamilybusiness.com/uploads/1/3/0/7/130776262/dbc70db.pdf
    • http://files.charsrestaurant.com/uploads/1/3/2/6/132680869/1958753.pdf
    • http://files.love1040.com/uploads/1/3/1/8/131871704/fanonov.pdf
    • http://files.jpravensbergen.com/uploads/1/3/2/6/132683181/6190965.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7287/9782/files/bopomogaguzetoresigeje.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5609/files/bimurixapusopibuzesugoz.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/acute_myeloid_leukemia_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0431/0050/4217/files/sozerilemu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2576/6312/files/50641504082.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/fire_detector_installation.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/xejivi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7565/6097/files/sidejotubukuzafo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/sociology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0453/4681/6155/files/alstonia_scholaris.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/jepoxum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5833/0786/files/dishonored_2_trainer.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d7b.bin
48f89ee230411b2bc387b592010ee38e6d43739013de113c5ad410dc18a97a5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7B 5780 bytes
font_01_sfnt_off00009122.bin
3b43b3bab9f2e66501c83dea4cfb6955925dc13c5dbc90fbf04ebe874d1afe44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9122 10580 bytes

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