Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ef1398ea838bdd…

MALICIOUS

PDF

44.8 KB Created: 2020-08-04 03:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d96061073bea0015df554fb4ee958b8b SHA-1: a2900fa5b928327b7d823ce896ee87e1e37729eb SHA-256: 46ef1398ea838bdd2fecc6e205b3c79b8953635c7ce6d2a325d2a9f2c00d46bb
152 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains the same search query as the malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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=portuguese+to+english+phrases+pdf
    • http://tamama.floydslighthouse.com/uploads/1/3/0/7/130775934/simipapufogera-warowisixa-datupefivilafow.pdf
    • http://files.antonellapiccinigallery.com/uploads/1/3/1/4/131438477/gagosepozasok.pdf
    • http://files.katiemachain.com/uploads/1/3/2/7/132710621/doduvetakojo.pdf
    • http://files.discountfootballshirtframing.net/uploads/1/3/2/7/132740685/kazodadonos.pdf
    • http://files.omanroadshow.com/uploads/1/3/0/7/130776841/kasulojemuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/vajazixufekosonerevej.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1155/files/71384574555.pdf
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/55464709032.pdf
    • https://cdn.shopify.com/s/files/1/0437/1234/8315/files/manual_de_apicultura_moderna.pdf
    • https://cdn.shopify.com/s/files/1/0430/0757/4179/files/regiw.pdf
    • https://cdn.shopify.com/s/files/1/0448/1833/3858/files/business_goals_2_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/9794/7300/files/rawifikemajuwez.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/42854487380.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/xijitonobov.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/menuzuvaxore.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/nuxogekinupexov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/kakapusabavirom.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ne

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000677f.bin
fab72c9e5ca96412c126d31ebe9175770e54e29c9afd0655e0ff73d9c85b4dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677F 5304 bytes
font_01_sfnt_off00007983.bin
a29016904eef8ede8ba0b77981844faf53c11166edc7b2561e9fa01a2f4e043d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7983 14480 bytes

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