Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a94fae287a274c…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 02:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2720652a9dfaa637f8adbdd1fe6479d5 SHA-1: ff4ac14b7c48c6bd48feb90f3e978dfddd76bf1e SHA-256: f5a94fae287a274ce510ac2809d7db351c840f2c505a8aa58964d9c28cad7e6b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=astm+a536+grade+60+40+18+pdf'. Additionally, it features a link farm with numerous external PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector URL is sufficient to classify the attack pattern.

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=astm+a536+grade+60+40+18+pdf
    • http://files.vettoriofficial.com/uploads/1/3/2/7/132710797/rekekavos-tixeligexewe-gudomevivefaso.pdf
    • http://kowutilor.maxelshipping.com/uploads/1/3/0/8/130874474/kudezuvona.pdf
    • http://files.cftrainingservices.com/uploads/1/3/1/8/131856270/5778481.pdf
    • http://files.aplincookgardner.net/uploads/1/3/0/8/130813645/kiwejumid.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/magudavar.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/bsc_biotechnology_books_for_free_in.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9029/files/nigefisupezusunowavisuxop.pdf
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/kozojiluwufub.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3510/files/cancer_de_mama_tratamiento_nutricional.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/has_next_implementation_for_2d_array.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/24669181037.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/10982863924.pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2591/files/pogotavoritegarudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/ranitib.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/goxenika.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b4.bin
11c3b5f4aa7572f02b903e496024420229faa98f85e9f85c8471c971c1632a08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B4 6236 bytes
font_01_sfnt_off00006ecc.bin
675ae78660cfcc41157045deb306ec79a5c67dea5a3b36e770d67b765d1925f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECC 10268 bytes
font_02_sfnt_off00009203.bin
2df60db25c4006ebf5ce7f30ca7461b7931ff48239c1caafece913cf4cb3b6f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9203 16136 bytes

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