Malicious PDF — malware analysis report

Static analysis result for SHA-256 183f89b67f54ad21…

MALICIOUS

PDF

35.6 KB Created: 2020-08-16 01:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b35ed9a402a78fec214793fa4c49b09d SHA-1: 6f17dc53cae0b199658c67b5572c0f56de47cdd2 SHA-256: 183f89b67f54ad2118950bd7515cadbb78a306c5cf80ca710580d00387f6dfee
182 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as information for obtaining a duplicate marksheet. The document also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and the invoice/payment lure heuristic further support a malicious intent, likely phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=mponline+mp+board+duplicate+marksheet+online+apply
    • http://files.christianbuildingmaterials.com/uploads/1/3/1/3/131378932/wobatozuzab.pdf
    • http://files.norfolksquash.com/uploads/1/3/2/6/132683292/jamekefafib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/jibunose.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/cobalamina_alta.pdf
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/82716162399.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7345/files/novosumezaged.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/all_bearing_types.pdf
    • https://cdn.shopify.com/s/files/1/0439/4188/8155/files/fidodonunawapupako.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/6836922430.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/56787178445.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/laduzivusupabopar.pdf
    • https://cdn.shopify.com/s/files/1/0448/1178/0257/files/baal_veer_episode_300_video.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41326774972.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_off00004d30.bin
7cc5802c36c8fe636504e433392483f05545700ecfd951efc5e8deb47ad084c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D30 5624 bytes
font_01_sfnt_off00006020.bin
95cd1c8b60e7cb4d7bac5e74ab4e62246df6bc378c39c3eaf3546ed5374a6239		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 9772 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.