Malicious PDF — malware analysis report

Static analysis result for SHA-256 d640cac35c53b967…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 12:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26bac92d5d387d0cd89171c85fb1ddcc SHA-1: f897700c2cb9fdec5ca37a6d7aeed927a5f96bdb SHA-256: d640cac35c53b9676d976be31adfea64de09c86281bafecf771e0419e063b349
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=casio+fx+570+es+plus+manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on 'files.standby-travel.co.uk'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirect URL, suggesting a lure to a malicious site.

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=casio+fx+570+es+plus+manual
    • http://files.standby-travel.co.uk/uploads/1/3/2/6/132695576/tibulurezoma.pdf
    • https://cdn.shopify.com/s/files/1/0437/7133/0712/files/the_bully_bluford_series.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/symbiotic_relationship_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/94116909088.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/fuxasejedikajedejiwufi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/83957670117.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/78870892937.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4651/files/35406062368.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/tibelewoxidapige.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/71773230089.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/xixaripadomusivizanuwipe.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_off000051e6.bin
ebc55d7c125e6cf149507683aad77aab18ba8c581966d8525ed1c2c8ccd5e430
pdf-font-stream PDF embedded font (sfnt) at offset 0x51E6 5268 bytes
font_01_sfnt_off000063d1.bin
7ce6cd802d4b421971760b06c083ed8017067805ca1e11a322d41b10b9b588d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 15152 bytes
font_02_sfnt_off00009290.bin
4ce97752c8d1ed0b0302a1507788019c6b738cc3ee96ca273f61f92c287db7cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9290 16072 bytes