Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafc120cda5a666a…

MALICIOUS

PDF

37.5 KB Created: 2020-08-23 01:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b6f16e052280e40b58b867ff343e596 SHA-1: be34ae95d6300add9c4cef9e77aa61a6ce73770e SHA-256: aafc120cda5a666a17d8b73f00d28953a9406a7f8ea288a50a859ea452aa0b57
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, a common technique for link farms. One of these links redirects to a known malicious domain (ttraff.com), suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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=brahma+vishnu+shiva+ede+kannada+song
    • http://files.combscoffee.com/uploads/1/3/2/7/132740553/badejud.pdf
    • http://files.rbflooringsolutions.com/uploads/1/3/0/7/130739864/vobekorukero_gadodazu_kevatamizes_vadutujulinelo.pdf
    • http://zikelo.larnemusicfestival.com/uploads/1/3/2/6/132683169/c1967e61aa7f3d.pdf
    • http://files.theetherealdream.com/uploads/1/3/1/3/131382243/2f43d609c5b965.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/fexafabavuvebove.pdf
    • https://cdn.shopify.com/s/files/1/0429/3623/8236/files/71258865513.pdf
    • https://cdn.shopify.com/s/files/1/0433/7287/1832/files/4005164949.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/41244656702.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/xuvojufamuvipegesonek.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/present_simple_present_continuous_exercises_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/wokoditez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72619586694.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/cours_administration_systme_sous_windows.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/fuzajibupaled.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/65035112494.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004af5.bin
4f277b67b3d7f25838b758cdf547b302d6cb03df25d72411e6091c6a50890522
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF5 5380 bytes
font_01_sfnt_off00005d26.bin
08d4a21db6ef926b6f25f92b6b49ac76eed8551d5d826088b8055f9815dbdd36
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D26 14448 bytes