Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e12138963f95943…

MALICIOUS

PDF

43.7 KB Created: 2020-08-17 15:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29b914880569c374cd1c7169350ae2d7 SHA-1: d7da32f433d1b5d3fc498deba89d3cdf459b8727 SHA-256: 2e12138963f95943eda199f7eaf336da5f6ad28771040220271be84e26b57a41
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=makita+circular+saw+guide+system'. Additionally, it features a PDF link farm heuristic, indicating a large number of external PDF links, with 'https://cdn.shopify.com/s/files/1/0435/7265/8335/files/jevuxudik.pdf' being the first identified. The document body, though partially corrupted, contains text related to a 'Makita circular saw guide system' and the malicious URL, suggesting 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=makita+circular+saw+guide+system
    • http://files.dancefuriously.com/uploads/1/3/1/3/131379118/3057c559.pdf
    • http://kovibox.dakotanaturalgoods.com/uploads/1/3/0/7/130738970/3666025.pdf
    • http://files.mwmresearchgroup.org/uploads/1/3/0/8/130813428/1809711.pdf
    • http://files.volusiairlcoalition.org/uploads/1/3/0/9/130969322/212380fbdba9a0c.pdf
    • https://cdn.shopify.com/s/files/1/0435/7265/8335/files/jevuxudik.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/arquitectura_viva_78.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/buzovixusig.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/68097495970.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/utah_statewide_warrant_search.pdf
    • https://cdn.shopify.com/s/files/1/0437/8034/1917/files/bethany_mota_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/fufinebumexux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunizededalusabunis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7619/8305/files/loxaxevagujunolarizesix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/tifemedulikuzarovuxoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/faragafolisunebiripidut.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_off00006d80.bin
26dbc1364b88e55b9111fed5603b32812fbeb3caba6954b4d70d20ed0c10c232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D80 5520 bytes
font_01_sfnt_off00008049.bin
5ac0eef236d2e4cdb54990415aaf2894124475e8049b114334d31bfc76745d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8049 9832 bytes

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