Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb04b78e8b18782…

MALICIOUS

PDF

44.7 KB Created: 2020-08-14 08:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f32d97987f00269b9b645b6b9f8b86b3 SHA-1: b358d68b2798556ebcd8b82e3dc5bc4651e95b2e SHA-256: fdb04b78e8b18782eceeb5254f493ba700cb0ff8e7d761120be0cc99d5531b76
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text referencing a "flight pilot mod apk hack" and the malicious URL https://ttraff.com/pify?keyword=flight+pilot+mod+apk+hack. This suggests the document is designed to trick users into downloading potentially unwanted or malicious software by disguising it as a game modification. The ML classifier strongly supports the malicious nature of this PDF.

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=flight+pilot+mod+apk+hack
    • http://sadokadi.iammengdiwang.com/uploads/1/3/1/8/131871390/3439587.pdf
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • http://files.susanadams.co.nz/uploads/1/3/1/4/131437249/9594412.pdf
    • http://files.mushinworks.com/uploads/1/3/2/6/132681901/9025543.pdf
    • http://files.reddogcnc.com/uploads/1/3/1/6/131637056/gupataboboxugolu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/53194482287.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29426312843.pdf
    • https://cdn.shopify.com/s/files/1/0430/8896/9882/files/gukabufu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9588/2918/files/fubezijuwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/paxevazajadimukuxixusej.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/niwopixozure.pdf
    • https://cdn.shopify.com/s/files/1/0438/3014/9270/files/bosquejos_cristianos_para_mujeres.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/danara.pdf
    • https://cdn.shopify.com/s/files/1/0433/6146/8567/files/xodofasogurebub.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0709/files/7402175660.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/macroscopic_haematuria_referral_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/5024/6054/files/libez.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_off00007002.bin
c393c403a38f44866b2eeb0b3e15edcb1b4a382e8e7b6dedad006ec8437e232e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 5232 bytes
font_01_sfnt_off000081b5.bin
a318db4972756ea40320887c93530e4fcbcd7b769360471b10759d90018d9b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B5 10544 bytes

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