Malicious PDF — malware analysis report

Static analysis result for SHA-256 152102e150abf5d0…

MALICIOUS

PDF

40.7 KB Created: 2020-08-23 23:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: babbbe1ce1c9f4d84af82852ba9dc823 SHA-1: 19e24ecc5ca65c044649edb5328bc4c58f7070b7 SHA-256: 152102e150abf5d0877a24753b70be77f9a9450ffce5b988c33055b63c376545
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links redirects to a known malicious infrastructure at 'ttraff.ru', suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains the text 'Blu ray disc movies free' and the malicious URL, indicating a lure to entice users to click the malicious link. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggests a phishing or content-luring 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.ru/pify?keyword=blu+ray+disc+movies+free
    • http://files.mommyendorsed.com/uploads/1/3/1/3/131384208/lofukidife-wimojewe-dufeg-viwasipazutudeg.pdf
    • http://files.artbyjenniferharrington.com/uploads/1/3/1/0/131070722/vidanexiv.pdf
    • http://vubixezu.eugeneysantos.com/uploads/1/3/2/7/132740405/koburosobowelojor.pdf
    • http://files.newheartdance.com/uploads/1/3/1/3/131384589/vevulo_nixepu_jilizel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8578/1397/files/zizuvon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/chemical_and_mineral_admixtures_in_concrete.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/94027601154.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/dozavanedisefurekiluw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/kumaluxilav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/98122054984.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/evolution_of_multicellular_life_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/9301/7247/files/branch_manager_resume.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_off00006112.bin
a0a3fccce4ce9fcafc85c8e41b48115f1ef723c286b4fb45ded64895f76f8a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6112 5380 bytes
font_01_sfnt_off00007354.bin
87fce9b515c9d455342b6e3849a9542757f1dec6888104a55e015f37cee93787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 10248 bytes

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