Malicious PDF — malware analysis report

Static analysis result for SHA-256 0247eeb0e29bda15…

MALICIOUS

PDF

45.3 KB Created: 2020-08-07 10:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f0fdeab6e0bf27185c9c5bbbefba623 SHA-1: 330182d4ab3ee23317cf5f8a846d8356556bb9be SHA-256: 0247eeb0e29bda15271378d537949f5f9210878b77074130ad7ced23f3e0b5fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a redirector. The document body, though partially corrupted, contains text suggesting a lure related to PDF editing issues, which is then linked to the malicious URL. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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=adobe+acrobat+reader+dc+cannot+edit+pdf
    • http://files.synergycs.net/uploads/1/3/1/3/131397973/lefenam.pdf
    • http://fezuz.sanctuaryofhoperetreat.org/uploads/1/3/2/7/132741555/8528579.pdf
    • http://files.crosskeysbarn.com/uploads/1/3/1/4/131406841/tokojiv_ranuwako_samimegozab.pdf
    • http://files.12chemistry.com/uploads/1/3/1/4/131437660/befud_xozipowu.pdf
    • http://files.demornewarrenddub.com/uploads/1/3/1/4/131409170/dakodup-simegi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/84213922989.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/x27_bus_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0434/4859/8678/files/10715894294.pdf
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/34318908569.pdf
    • https://cdn.shopify.com/s/files/1/0437/9059/8305/files/80836117448.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/46426069475.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/saxamakujawifuxikagexe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/92690970190.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8041/files/16293616666.pdf
    • https://cdn.shopify.com/s/files/1/0435/2186/7930/files/71204927875.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/92182413227.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34993807018.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_off000070ce.bin
d33022101761824b0ce8a3341c67c651ce69294321a67d2c25f693dc2f3c4578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CE 5068 bytes
font_01_sfnt_off0000821b.bin
808d26360e656a480e4495bf82aae550ae15a20245e3a9bfe71e0a9e8d5f47f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x821B 11032 bytes

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