Malicious PDF — malware analysis report

Static analysis result for SHA-256 061f7903725e9203…

MALICIOUS

PDF

41.5 KB Created: 2020-08-26 21:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57a8353c75270fb84c4fbd1a0bb89bf9 SHA-1: 385eb8e2fb0485737fbb77963cc80dff51539df0 SHA-256: 061f7903725e92034c684d4ef9da4728aef75f24f85d35205bd0643971b05df0
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDF files, many hosted on Shopify. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, 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=reacciones+de+identificacion+de+carb
    • http://files.millersaddlesandsilver.com/uploads/1/3/0/7/130740196/pazumediwinavolod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/20302964222.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/bakiluwubil.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4764/files/world_time_zone_chart.pdf
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/mhgu_charge_blade.pdf
    • https://cdn.shopify.com/s/files/1/0434/5833/0786/files/31764567526.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/streaming_api_trailhead_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/48109093134.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2478/files/57141345149.pdf
    • https://cdn.shopify.com/s/files/1/0435/7393/6291/files/bujivulixazakego.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_off00005700.bin
342d38eabe9c37d5b7e8fd6ca46800762cafd07cfb72d43006ec8ebfc08e0ca9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5700 4916 bytes
font_01_sfnt_off000067bc.bin
b1bb3b4b91bf1be5563449f76ebf88e265c053ffc9cdb67b9808d0018863b904
pdf-font-stream PDF embedded font (sfnt) at offset 0x67BC 10400 bytes
font_02_sfnt_off0000899e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x899E 4324 bytes