Malicious PDF — malware analysis report

Static analysis result for SHA-256 785bab4005554717…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 17:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bb7ff945161ece6779b2d74528bc7cd SHA-1: 800141a470ecb85c4a9a28de6433c4d8e18e2475 SHA-256: 785bab400555471748eae928394bb6bef18b013d1d854357b5f41647cfc96e1a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Berlin subway map pdf". The presence of many external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or redirection attempt.

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=berlin+subway+map+pdf
    • http://files.britishbelgianbantamclub.org/uploads/1/3/0/8/130813413/7181706.pdf
    • http://files.reddeerhospice.com/uploads/1/3/2/7/132712323/nareboxovoxe_gasikele_wiraxiva_javab.pdf
    • http://files.pegasusmodelclub.com/uploads/1/3/0/7/130775014/5563903.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2362/8450/files/lufujejoxinu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/84673727857.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6294/files/56697952747.pdf
    • https://cdn.shopify.com/s/files/1/0435/7075/7791/files/82472618012.pdf
    • https://cdn.shopify.com/s/files/1/0440/3786/5637/files/36770252298.pdf
    • https://cdn.shopify.com/s/files/1/0433/6196/0091/files/13648871851.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/20706274468.pdf
    • https://cdn.shopify.com/s/files/1/0431/0758/2106/files/jijokasosalifuzexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/bisaxariba.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0058/files/fafunoluwejagikofopukoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/xakolibiwejabadolurarimur.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/afmc_previous_year_question_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/jexepeja.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/27849814397.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_off00006a26.bin
ed5cea37aff9443a522d24e7ff20a9cb6fd0701bd90f3e487f503455686c7581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A26 5568 bytes
font_01_sfnt_off00007d17.bin
6b1a25e00283394a8a3f88ab48a9b86faaef08008cf75e835b561f338df13516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D17 10024 bytes

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