Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f86705b3197e357…

MALICIOUS

PDF

41.6 KB Created: 2020-08-31 00:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9480b4bc558dbf91ab8c88aac321d390 SHA-1: 9d84d5bd51081f4d2b2d718e3ba5b6327842e60c SHA-256: 5f86705b3197e3573d696f7f3e45199600d7d874de5d3a039dd31a15b12bcefd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose of the PDF is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document structure itself is the vector for the 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.me/wix?keyword=yugioh+world+championship+2010
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/3914226847.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/latilikeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/direzulizu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4663/2614/files/mosixakiveteneruwekewoko.pdf
    • https://cdn.shopify.com/s/files/1/0432/8993/6025/files/datexafamamapawevejajiku.pdf
    • https://static.usrfiles.com/ugd/9ea91e_6200e27c77ea4c20b9c9d2886fa49b3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ee0e4978d2f4d1aa929704d3dc48fbb.pdf
    • https://cdn.shopify.com/s/files/1/0452/6509/2765/files/18081475816.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1824/files/74246615104.pdf
    • https://cdn.shopify.com/s/files/1/0432/3026/5511/files/pregnancy_category_drugs_list.pdf
    • https://cdn.shopify.com/s/files/1/0439/2140/8168/files/natures_domain_cat_food.pdf
    • https://cdn.shopify.com/s/files/1/0463/3313/2955/files/lixomirobuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/8268/4318/files/kemaweganatozivinoliwos.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/instrument_calibration_certificate_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/textbook_of_biochemistry_for_medical_students_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/80335465284.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/zitepibi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ef.bin
152b40c851855b1fde6cd2521256171cecfe1db4fe5a0b6a367e8ac29fbfbe66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EF 5868 bytes
font_01_sfnt_off000077d4.bin
3c0dbf075cabe4d6a553976614e7c8282dbf9062a68e471a3585d71e4068fc57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D4 9836 bytes

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