Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f74234d99a20336…

MALICIOUS

PDF

40.9 KB Created: 2020-08-03 18:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 824f410167cc2d8bebe0a2984e39359c SHA-1: 00fcc89bba0931fc1779844aaea42ba63d9e859d SHA-256: 6f74234d99a20336f3632838ec698c43d3582452aa05bfa2117362d5ce5d36e4
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect the user to a harmful site, likely for phishing or malware delivery.

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=standard+costing+and+variance+analysis+formulas+pdf
    • http://files.michaelcgavin.com/uploads/1/3/1/6/131607075/4188521.pdf
    • http://files.elirakuka.com/uploads/1/3/0/8/130814009/6772580.pdf
    • http://files.huntcountytexasmissing.com/uploads/1/3/0/7/130776578/silubipusara-legowepezegogu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/fujixixutabojoxebin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/vodowifafulodolenipoveme.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/jimazowoxakakogiko.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/honeywell_6000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/55712689796.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9095/files/xegobunuwetuxegafano.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/vivaldi_summer_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/viwawebaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/bokomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8402105605.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5240/files/65213124433.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/kupufu.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_off00005ea9.bin
dc7aa61e9edd9dc945464c867a09967001c763fc6777ceaf182bbeb2b53d2369
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA9 5740 bytes
font_01_sfnt_off00007230.bin
b831d1f429a29f9d08c86d7829fa1d56cd32893774765bbd9ad47e4fec31a397
pdf-font-stream PDF embedded font (sfnt) at offset 0x7230 10424 bytes