Malicious PDF — malware analysis report

Static analysis result for SHA-256 145008dcf37a596f…

MALICIOUS

PDF

61.9 KB Created: 2020-08-04 09:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fffec8945c11e346dea729ac1ff5465a SHA-1: 3e4f086bd6982485dfdc48649620d2de4049529c SHA-256: 145008dcf37a596fe8618a0c216f93577a34bfc48c3e55281e7f3127b2f0c69d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded URL points to a redirector that likely leads to a malicious payload. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links suggest a phishing or malware distribution attempt.

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=arduino+super+starter+kit+pdf
    • http://files.natrulay.co.uk/uploads/1/3/1/3/131378776/3c4c2ac6a09f5e.pdf
    • http://files.theteamvision.net/uploads/1/3/1/6/131637814/3694776.pdf
    • http://files.savemartlascruces.com/uploads/1/3/1/4/131453990/zodovud.pdf
    • http://files.steffenhurka.com/uploads/1/3/2/6/132682790/540499.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/wezifoxatozisodiremofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/rizirefutoje.pdf
    • https://cdn.shopify.com/s/files/1/0434/1674/8188/files/kexibowikunevexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/3450005169.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/bizutewepavozepulejireki.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/zogoxosaruvemujibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/berlin_marathon_course_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/tarederidonadonis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/science_puzzles_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/15627387101.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/39305141582.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009cc3.bin
14f6df9c7eba4e5172a319a7c50c3ee52695c26dda4f12765ad75abbd6efd5bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC3 5056 bytes
font_01_sfnt_off0000ae0b.bin
be1c0207c6e44944fcff340740d52397b9ff8d5f6c4a349ec3f480b3f4c56901		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0B 11672 bytes
font_02_sfnt_off0000d50f.bin
6820151f9a4816bccc9e85e605aef44ce22c8924dfcccd161584754f275bf028		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD50F 16132 bytes

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