Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdfe180d1d7a78d…

MALICIOUS

PDF

53.1 KB Created: 2020-08-03 12:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d69980b7b844b6f6bf53f9deda03d870 SHA-1: 927f99547f77f9637d008bd8c074b0a034563906 SHA-256: 8bdfe180d1d7a78de8a90e14c300e668adfe02842def327d6a21492cabc0f482
152 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 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text suggesting a lure for a research paper. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=clinical+pharmacology+of+anticancer+drugs+pdf
    • http://files.entertainmentgippsland.com.au/uploads/1/3/1/1/131164250/223280.pdf
    • http://files.ericmccarron.com/uploads/1/3/1/8/131856290/dfca7220.pdf
    • http://files.inspiralgroup.co.uk/uploads/1/3/1/4/131438461/bixavafiveso.pdf
    • http://files.athenselks973.org/uploads/1/3/1/4/131438195/8422098.pdf
    • http://files.stonecutterswsq.com/uploads/1/3/1/4/131437311/vupugukizazal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8198/files/kituwajelifozebeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/62547103658.pdf
    • https://cdn.shopify.com/s/files/1/0433/3528/6943/files/2005_lexus_rx330_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/65203477656.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/pinugibowejaxilun.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/bujizidikorexegodas.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/modopij.pdf
    • https://cdn.shopify.com/s/files/1/0439/8042/3326/files/67866815863.pdf
    • https://cdn.shopify.com/s/files/1/0441/3957/7496/files/woodmaster_718_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/13th_skull_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/pharmacy_technician_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/15435480679.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_off0000847c.bin
453a2904def503252e2cb1578232c1df78a0cdaa5246c85f5d329099d40f9a8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x847C 5576 bytes
font_01_sfnt_off0000974e.bin
39ab4a1649f81d65fb24239353bfe4a654e59a7cbaea983ad9e5d1f67608d46d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x974E 15488 bytes

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