Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b9caa6c24b6092…

MALICIOUS

PDF

29.7 KB Created: 2020-08-18 16:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09568d8db7e12a71168869eb1d794782 SHA-1: e80a629d37f98f9847b5b153d1b350f1a9470896 SHA-256: f5b9caa6c24b6092c4e7d0cb87eb587103068aed18169b0ef9ec9e369e3cbd5f
174 Risk Score

Malware Insights

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

This PDF document is designed as an image lure, presenting a screenshot to entice users to click. It contains a critical malicious redirector link to 'https://ttraff.com/pify?keyword=burkert+flow+8025+manual', which is a strong indicator of phishing or malware distribution. The document also hosts a link farm of other PDFs, likely for SEO manipulation or to spread malicious content further. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 29 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=burkert+flow+8025+manual
    • http://files.grinterfriends.com/uploads/1/3/0/7/130775174/2796385.pdf
    • http://files.nakedgoatsoapco.com/uploads/1/3/2/8/132815791/popixotorab.pdf
    • http://sipujobi.oldgoatlures.com/uploads/1/3/1/4/131453134/kufusakowe.pdf
    • http://files.luxefamilyholidays.com/uploads/1/3/1/0/131070291/mojuxatis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18813115042.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/33344540216.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/92271681743.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/paxurusabiwoxekazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/wunawowenixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4256/1433/files/misaripixojetefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/fesibumumurofobidanudemu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/bachelard_epistemology.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/10728403642.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_off00003e04.bin
52de989c05b56ad2978e640ade7b2d191dedb72fb8462d24900bbb9bafdbca3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E04 5532 bytes
font_01_sfnt_off000050e1.bin
155537e54e48ca2227cda63f387ce6d2a9a7fa6a374321cb46d192a53f3f5847		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E1 7460 bytes

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