Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b7179884685f38…

MALICIOUS

PDF

43.5 KB Created: 2020-08-07 03:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ae0dd09527f51b0450e58715aad157f SHA-1: 4b08adc60c3407ebeccc4d581298240f2c9377e3 SHA-256: 07b7179884685f38cff072b2fe54c6a477c3486214689ca0ec77c5d4126151ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=ahpra+social+media+policy+pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same suspicious URL.

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/pify?keyword=ahpra+social+media+policy+pdf
    • http://files.linkrenovations.com/uploads/1/3/1/4/131407737/zulavawilatixevovir.pdf
    • http://files.testingequipmentstore.com/uploads/1/3/1/0/131070178/2f90de622.pdf
    • http://files.lemondropdivas.com/uploads/1/3/2/8/132814929/rolaxekesip_kezusizekov_weniwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8813/3787/files/masakudotu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/21546029586.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8209/files/7108971432.pdf
    • https://cdn.shopify.com/s/files/1/0429/5006/6339/files/4946203235.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/51703688852.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/24097458476.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4182/files/vaporine.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/game_design_document_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/kekagewesarorexogivoma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/future_of_artificial_intelligence_in_banking.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/ethiopian_orthodox_bible_in_english_81.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/5525846212.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_off00006c8c.bin
0b339ab4ee2bd3e4d3dff8ef386d47224c2577f05333cb12d998878250abb661		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8C 5484 bytes
font_01_sfnt_off00007f14.bin
08b9c28ec48e3481fb58c89c61ba0306194e29c830ebd1f8a98defae85739d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F14 9964 bytes

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