Malicious PDF — malware analysis report

Static analysis result for SHA-256 e775fe6578ea4c32…

MALICIOUS

PDF

120.9 KB Created: 2020-08-26 00:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed4a8183e7636aa74a189f98ac064141 SHA-1: a1d3a56bd37e36a00ccaed36b77d98ad7d15fa9c SHA-256: e775fe6578ea4c32ab5534ac46790be3b90b9c98eb2d650252f2fd553a0ac46e
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text related to a 'Path of exile prophecy guide', indicating a lure. The PDF also contains a large number of external links, many hosted on shopify.com, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. The ML classifier 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.cc/pify?keyword=path+of+exile+prophecy+guide
    • http://files.liquidsunshinedesigns.net/uploads/1/3/1/6/131606644/6427307.pdf
    • http://nowada.joanneholtje.com/uploads/1/3/1/4/131438759/suvusameda.pdf
    • http://nogali.capabilitygray.com/uploads/1/3/2/7/132741555/patojezirelulalam.pdf
    • http://mogijo.vanessagonzalezart.com/uploads/1/3/1/0/131071164/e1b3a1c.pdf
    • http://xoxame.microblading-amsterdam.com/uploads/1/3/2/8/132814930/9885180.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/dark_angels_painting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/3347/5737/files/54302213652.pdf
    • https://cdn.shopify.com/s/files/1/0465/1008/0158/files/math_addition_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/45755420155.pdf
    • https://cdn.shopify.com/s/files/1/0439/3274/5896/files/multiplication_facts_worksheets_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/41299742801.pdf
    • https://cdn.shopify.com/s/files/1/0441/1057/7816/files/apa_citation_format_online_website.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0430/2903/7219/files/pekimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7411/7015/files/91440249833.pdf
    • https://cdn.shopify.com/s/files/1/0437/4655/8106/files/assurance_vie_2018_performance.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/lesson_17_equivalent_expressions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/fanomakex.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/english_newspaper_articles_download.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_off000196f3.bin
d40f99ef5739f526b7db20cb3c8b72182284b75049c65d1027a36fa2ec8d4a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x196F3 5408 bytes
font_01_sfnt_off0001a962.bin
e27fe323920ebcd67d818060fa75e3abd6255b3925942afa77529445ceac359b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A962 13896 bytes

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