Malicious PDF — malware analysis report

Static analysis result for SHA-256 39813b5a00bc2d3a…

MALICIOUS

PDF

48.9 KB Created: 2020-08-01 23:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13277dce7562b263fc89eced6d3a3c5d SHA-1: c8b231558197c0ab646d4b441b537f45cf6678e2 SHA-256: 39813b5a00bc2d3a9c295817c17065257052408b1576314c0da7822e52e7ac65
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=www+pipeline+wayne+edu'. Another critical heuristic indicated a PDF link farm, with 30 external PDF links, many hosted on cdn.shopify.com. The document body contains text related to 'www pipeline wayne edu' and the wkhtmltopdf application, suggesting a potential lure or obfuscation technique.

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=www+pipeline+wayne+edu
    • http://files.goshawarmastop.com/uploads/1/3/1/6/131607662/ce156297.pdf
    • http://files.veronicawolfeartist.com/uploads/1/3/0/8/130813859/towego.pdf
    • http://files.streamskinz.com/uploads/1/3/1/3/131398428/julupujenopo-jewidokosimadi.pdf
    • http://files.mancalamonk.com/uploads/1/3/2/7/132740362/fasez.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8598/files/jekupedijogidumiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/sexogumusaritotaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/9234/3970/files/vaweni.pdf
    • https://cdn.shopify.com/s/files/1/0435/7550/9155/files/zinelisumebup.pdf
    • https://cdn.shopify.com/s/files/1/0432/8839/5936/files/gewinomowabapeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/xurozojapekidorokubabas.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/99509567117.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/sorusixuvig.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/81294773324.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/2995057762.pdf
    • https://cdn.shopify.com/s/files/1/0434/4869/6993/files/fallout3_walkthrough_pc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000749e.bin
8ed6deabd27bc4dd1272ae4ee7430010663165de4e66ae73d2f25bbe7ed60017		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749E 4576 bytes
font_01_sfnt_off00008444.bin
1a9f7b77ce88ef42cda00543de04af32f2477872f5ccbb07812787a5666c42ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8444 10684 bytes
font_02_sfnt_off0000a8d6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D6 4324 bytes

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