Malicious PDF — malware analysis report

Static analysis result for SHA-256 202e986c1de30f78…

MALICIOUS

PDF

41.6 KB Created: 2020-08-24 12:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 327bede31966be0b98be338ffe5c3a2c SHA-1: a6092aa1f9da72c75bfcdccdf71427cb03454db1 SHA-256: 202e986c1de30f78b8de59b6ce7c8fd9464d93cf5d047205db621ec6a1d4717e
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though partially corrupted, contains text related to 'salary arrears calculation sheet', which is likely a lure. The presence of a large number of external PDF links, including one to 'cdn.shopify.com', suggests a link farm or redirection strategy. 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.com/pify?keyword=salary+arrears+calculation+sheet
    • http://files.britishcockapoosociety.com/uploads/1/3/1/3/131379409/cf6607fa05cba26.pdf
    • http://files.bunsnrice.com/uploads/1/3/1/3/131379776/sezazitulola-ritetajo-pisikijafamelep-puferaru.pdf
    • http://files.musicgnw.org/uploads/1/3/1/4/131406563/2715975.pdf
    • http://files.andyknappmusic.com/uploads/1/3/0/9/130969954/basuk_fidajuxe_najabalidigexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3305/8715/files/royal_canin_golden_retriever_puppy_feeding_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/wujubomojuwusalaxokad.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/1772689262.pdf
    • https://cdn.shopify.com/s/files/1/0448/4349/9677/files/body_language_essentials_joe_navarro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/amoxicilina_500_bula.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/vezulatomiregato.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2622/files/71968550047.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/vojodulotub.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/john_deere_l120_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/gaxuwawife.pdf
    • https://cdn.shopify.com/s/files/1/0429/8086/8255/files/diputojosonidebevi.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_off00006485.bin
f4fead54a58c1bad022d2b383979871b502220538dbd14690f2f721c18af7db6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6485 5092 bytes
font_01_sfnt_off000075c4.bin
7f8f0957030ce3b2ec7c9a4830a3e090629fbfd612d51b5bb5db3f4fca5dc7a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C4 10348 bytes