Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45bc2fd1e9cb460…

MALICIOUS

PDF

38.0 KB Created: 2020-08-02 05:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f147c7d3a9798f3a383f58db35a8ed5 SHA-1: 4f17bbdc57c41273d212fb935ac54b937bcf476c SHA-256: b45bc2fd1e9cb46043d52dd9f36e61609f253e3644ad0a0ef6eb9bb85445b8f3
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=chingy+pullin+me+back'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDF files, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. These factors suggest the document is designed to lure users to malicious sites or distribute further content, likely as part of a phishing or SEO-based attack.

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.cc/pify?keyword=chingy+pullin+me+back
    • http://files.goshopgco.com/uploads/1/3/1/4/131437689/dikepebemuru.pdf
    • http://files.bondybluereview.com/uploads/1/3/0/8/130873715/a07577a8.pdf
    • http://files.transformationextender-community.com/uploads/1/3/1/1/131164185/tagoribedejifu.pdf
    • http://files.artistmelindabeck.com/uploads/1/3/1/3/131380213/rutalifarukubefibe.pdf
    • http://files.satxinspector.com/uploads/1/3/1/1/131163691/b8e7b.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/lunubikisozegikikuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/nowivowusekilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/zosizasuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/rorapofapufedi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/momagunadiradux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/51465070699.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/jezujumovetulapid.pdf
    • https://cdn.shopify.com/s/files/1/0433/6330/3575/files/xewetebupikitapirir.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/70079016949.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_off000056bd.bin
dc97fbdd7cae27c91371e5c282a1730ef0567465f3427a566230f57a082c861c
pdf-font-stream PDF embedded font (sfnt) at offset 0x56BD 5284 bytes
font_01_sfnt_off0000689d.bin
0d922b658c66c9063f8f79d28a5144c806712decdc9066829f0cbd29377eba95
pdf-font-stream PDF embedded font (sfnt) at offset 0x689D 10260 bytes