Malicious PDF — malware analysis report

Static analysis result for SHA-256 6773988e2327be56…

MALICIOUS

PDF

43.2 KB Created: 2020-08-12 19:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fa9ffc5b3dc6a9aa523ec4252618a91 SHA-1: 795edeb1ea89726a67daa3328aba48d2594adca0 SHA-256: 6773988e2327be56a9e6694035f20e2d849967b3e1612fffce49ae8dfbd33cce
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL `https://ttraff.com/pify?keyword=alejo+carpentier+concierto+barroco+pdf` identified as a malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for phishing or malware distribution. The presence of numerous Shopify links, while some are benign, contributes to a link farm strategy to obscure the malicious destination.

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=alejo+carpentier+concierto+barroco+pdf
    • http://files.innerheartpathways.com/uploads/1/3/2/6/132681002/46e9335.pdf
    • http://files.thriftradiateshappiness.com/uploads/1/3/2/6/132682124/601070.pdf
    • http://files.refugefriendsinc.org/uploads/1/3/1/8/131856071/2005909.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5814/2120/files/34557512245.pdf
    • https://cdn.shopify.com/s/files/1/0436/1804/2018/files/dovexa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6498/files/88894828551.pdf
    • https://cdn.shopify.com/s/files/1/0428/6090/4604/files/new_riven_skin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2149/files/tevijiboned.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/61977571310.pdf
    • https://cdn.shopify.com/s/files/1/0429/6310/8003/files/carnet_de_sante_france.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/14691648560.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/96591796554.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41557636134.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/vidunuwufunipalopitenawa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/53228619245.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/vuzadokiwamuk.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_off000068a3.bin
1d24566ea4fc2815ac72d906a08c9aea4d749541272a0b6777fee240af86906e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A3 5176 bytes
font_01_sfnt_off00007a49.bin
8dd0486c5154aed49fe4353179f16555b936141f4b45712ad83f79fa282b9d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A49 10872 bytes

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