Malicious PDF — malware analysis report

Static analysis result for SHA-256 c143791b2cc96d20…

MALICIOUS

PDF

50.1 KB Created: 2020-08-08 23:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2c846802323d608a3ae8bdb787d61b5 SHA-1: 21d753e5792419ead1fc94ca97d2c23a05eb752d SHA-256: c143791b2cc96d204c0fbb09f680570d182c896c629f1ea92d40a5b5c9620985
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'liturgical dances holsinger pdf' and the malicious URL, indicating a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=liturgical+dances+holsinger+pdf
    • http://files.rhmorriesonawards.com/uploads/1/3/1/4/131438161/382fe84020d7e4.pdf
    • http://files.billyberkouwer.co.uk/uploads/1/3/0/9/130969710/nilinajolod.pdf
    • http://files.smsdblueeagle.com/uploads/1/3/2/6/132681670/pemonixubob-gorazojebumamik.pdf
    • http://files.longjourneyhome.net/uploads/1/3/0/8/130874582/5963903.pdf
    • http://files.pikespeakradon.com/uploads/1/3/0/8/130814055/44b0833603b40.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/dodojisijopozet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/11866106733.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/bevuxogibazukerilimadabo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/ethiopian_grade_9_english_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3557/files/icap_business_law_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/55012250548.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/java_swing_timer.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/ffxi_rdm_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8247/1837/files/im_with_busey.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/bexesunexepagifuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/61483060321.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/63431485596.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/1139980643.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/31686249888.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000862b.bin
a85240d8b5161089edcf637263891a49aada84b85b7d7899ff2ae7c10955ff39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x862B 5360 bytes
font_01_sfnt_off00009862.bin
9d5494d8b560bd1035f613e4ce739f492cf9c8e5eda825fcda23eca8a2333dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9862 10120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.