Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf304cd325e22a6…

MALICIOUS

PDF

44.3 KB Created: 2020-08-17 11:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d134e13b4f1dae591d9ac5f69f38b4fc SHA-1: b4ce3feaee473391dc4e0625ec4b123cc00929df SHA-256: ebf304cd325e22a6beaef097076d95afddde84a32e437124f033a01cae775e74
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1200 Hardware Add-Ins T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate PDF files hosted on Shopify. However, one critical heuristic indicates that these links lead to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, also contains the same malicious URL, reinforcing the intent to redirect users to harmful content. No scripts were extracted, but the sheer volume of malicious links points to a link farm or SEO poisoning 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.com/pify?keyword=hiking+guide+zion+national+park
    • http://files.bandbac.net/uploads/1/3/0/8/130813841/3113811.pdf
    • http://files.seattlemobiletinting.com/uploads/1/3/1/0/131070202/fijot-kepulomonuvesux-jejidugu-ruruzasepipej.pdf
    • http://xixeged.discoverhispresence.com/uploads/1/3/2/3/132302921/zalofi.pdf
    • http://files.thecritterranchllamas.com/uploads/1/3/1/3/131384400/c369cccf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/1970c10_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0435/0846/5828/files/roman_catholic_songs_in_tamil_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0439/1046/3643/files/73446628353.pdf
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/10270493088.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/60746031328.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/gutavogoguxom.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/dexotusubuzamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/95163299228.pdf
    • https://cdn.shopify.com/s/files/1/0430/3310/0439/files/jetotidakajapoze.pdf
    • https://cdn.shopify.com/s/files/1/0433/3010/9593/files/rizuzukagowuzukituno.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/us_military_phonetic_alphabet.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_off0000707d.bin
48810b692999cc6de5c29f110fd021ff025624266fba7ff9d063daf9c2491acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707D 5024 bytes
font_01_sfnt_off000081a3.bin
3daa15de1ab0e90319744470a22096972316de1aef4537d8e7e865105e61532e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A3 10004 bytes

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