Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b72643f7fdf5d8…

MALICIOUS

PDF

34.3 KB Created: 2020-08-24 01:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f654b511137a74067bed3dcf28d6f0d9 SHA-1: a1451b613454e239133cf999cb01d91fd9aa2ba4 SHA-256: 89b72643f7fdf5d8c0f9b4d71515aae7500d3a70d15e2a4c065a31b0caab870b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text referencing 'Kangan song ranjit bawa ringtone' and the malicious URL, suggesting a lure for users to click the link. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the primary malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=kangan+song+ranjit+bawa+ringtone
    • http://files.gtc-elite.org/uploads/1/3/2/6/132682570/netefikuvuboz_fifajog_jubakafa.pdf
    • http://files.zappra.com/uploads/1/3/1/4/131409597/bcf6d.pdf
    • http://files.anna-pearson.com/uploads/1/3/1/4/131483492/xiporokomukixifoveka.pdf
    • http://files.nicolebarry.ca/uploads/1/3/0/8/130874326/4967409.pdf
    • http://fiwopuduw.desertmiragekennel.com/uploads/1/3/1/4/131406893/6133395.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/borubinafuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9815/files/blogs_de_libros_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4535/files/encyclopdie_universalis_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0434/4587/8950/files/guxewefemumupi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4905/7430/files/9935029629.pdf
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/pikoxakoxebin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wuwikeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/8474/9729/files/architectural_drafting_and_design_alan_jefferis.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/pepiputazawaga.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/88189335980.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_off00004a2b.bin
f50ac952522841763f80bcdd5b58a8a32fbf0ff6364cb94b932a49671f46f846
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A2B 5096 bytes
font_01_sfnt_off00005bac.bin
d21831fdc2efdc541ef43811505886aff9c6ad06104cb6281b1b843935b3595a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAC 9544 bytes