Malicious PDF — malware analysis report

Static analysis result for SHA-256 18431fd82189a409…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 14:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec1de3e138541233885d856d5483edec SHA-1: 6afe1580480e101e6e3a410dec3e4fcb081086ec SHA-256: 18431fd82189a40922094deaae8440f36683518a745041ad3593563fbe7fe283
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same URL and a keyword suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious sites.

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=chore+chart+template+numbers
    • http://files.amymengphotography.com/uploads/1/3/0/9/130969254/8654118.pdf
    • http://files.bizsupportservices.com/uploads/1/3/1/4/131438216/bupazifunokijukigut.pdf
    • http://files.tasconfilms.com/uploads/1/3/1/6/131636889/wugorojojawapagubov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/structure_of_alcohol.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/bopewotisovaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/sda_hymnal_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1398/files/multi_page_photoshop_cs5.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/workplace_spirituality_and_job_satisfaction.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/6266454652.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/maths_formulas_for_class_10_state_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0440/6578/3958/files/auditing_assurance_services_and_ethics_in_australia_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/3863/6192/files/jurnal_pembuatan_preparat_apus_darah.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/74865813694.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/raxonabalamumawipe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/gugiwijewuvud.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_off00006e18.bin
53d3918984bd770bc6596e1285ce667ab3cffd5b3b7cb239d2d4c440bcb0d785		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E18 5220 bytes
font_01_sfnt_off00007fa5.bin
17c4b55d7fa8f4456480ea0846d4ffb30796067951cf1b48b209575952112886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA5 10236 bytes

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