Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4531dfeeb4c98c3…

MALICIOUS

PDF

40.1 KB Created: 2020-08-17 14:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aa3d0e3dbaf511ee64aaafc348a6c6d SHA-1: eb05aa1c475e05cc11b5f913686cde1950fdb8f2 SHA-256: f4531dfeeb4c98c33dcafd85232df985ab7314563d3dcca5534ac5ae7e99eede
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to 'post office small parcel size guide' and the malicious URL. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure malicious destinations. The primary malicious URL is 'https://ttraff.com/pify?keyword=post+office+small+parcel+size+guide'.

Heuristics 3

  • 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.
  • 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=post+office+small+parcel+size+guide
    • http://nawerowez.jaclynjaramillo.com/uploads/1/3/1/4/131437987/b5e1b.pdf
    • http://files.kaitlynnaisling.com/uploads/1/3/1/4/131437919/xotokivovaturif.pdf
    • http://terawuwik.wishfulvintage.com/uploads/1/3/1/3/131383982/087b359d0f963cd.pdf
    • http://files.stagerighthomes.net/uploads/1/3/0/8/130874330/moxomazusowaf-gemixavoborod-wodol.pdf
    • https://cdn.shopify.com/s/files/1/0437/2443/9717/files/ncert_physics_textbook_class_12_part_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/ripojafonadizodiduzib.pdf
    • https://cdn.shopify.com/s/files/1/0428/7696/0924/files/kaximugirugebedowopebulod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3829/files/vafikadolep.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/72318289759.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/concise_paediatrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/watch_men_in_black_3.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/parerod.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/fiporufefujufen.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_off00005da9.bin
e821a4f7807b327ba982d8ee4c608cd3998536d6786702846a2772681531ad16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA9 5524 bytes
font_01_sfnt_off00007062.bin
71c5fa340768b30d24915e7a5438f3ddf1392f56d0b04d3e7698ef709769b234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7062 10312 bytes

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