Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1860109cba9f204…

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 23:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 325f6fe400a563d84f37e022a4b833ef SHA-1: fa7348335c382f90e2339fa6246b608d64d597a1 SHA-256: d1860109cba9f204046bb12ade8e2cbcb50af6365682b1439290c4de8e27f8ec
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates a malicious redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary goal is to redirect the user to a malicious site, likely for phishing or malware distribution.

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.ru/wb?keyword=origami%20crane%20step%20by%20step%20pdf
    • http://files.cantsitstill.net/uploads/1/3/0/9/130969322/tezofat.pdf
    • http://files.holleyslandscaping.com/uploads/1/3/1/0/131070378/44bde646268.pdf
    • http://files.smarthvacsupply.com/uploads/1/3/0/7/130739570/4034038.pdf
    • http://files.downingcommunityadvisors.com/uploads/1/3/1/4/131408772/zufoka-lusiwaviv-zurafuro-tozononopu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/busy_works_beats_chord_codes.pdf
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/the_process_auditing_techniques_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/92869159697.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/bass_guitar_lessons_for_beginners_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7570/files/28002667939.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/xorosike.pdf
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/powerpoint_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/manfaat_daun_binahong.pdf
    • https://cdn.shopify.com/s/files/1/0437/9177/7952/files/anandamela_pujabarshiki_1426_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/2006_volvo_xc90_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.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_off00005f5c.bin
5b25231209b4d3712b7ab844f7bb492f35b622c5c3fba57a89c37465b533861f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5C 5712 bytes
font_01_sfnt_off000072aa.bin
93f3c378716f532c3b0c7ab1729b3a6cd98a604b44eed5553c5cb728aaf036df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AA 10292 bytes

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