Malicious PDF — malware analysis report

Static analysis result for SHA-256 85019bc43f11284c…

MALICIOUS

PDF

44.0 KB Created: 2020-08-08 02:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc6f2ecb5e457919bd44c46d70c10c76 SHA-1: 3267905a5c90728a0b2f29ac280343fd7359cca3 SHA-256: 85019bc43f11284c2fa434f8d76f2754cab2438562d7545a5481edd0f25ed216
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation and traffic redirection. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=perdix%20ai%20user%20manual
    • http://files.sisterearthclayworks.com/uploads/1/3/0/7/130776409/rizibuk-vinutejoged-negidunelo-bigejoju.pdf
    • http://files.brandonchamberlain.com/uploads/1/3/1/1/131163540/potugogojema.pdf
    • http://files.rainforestab.ca/uploads/1/3/0/7/130776326/7e130.pdf
    • http://files.thirdcinemaproductions.com/uploads/1/3/1/3/131379749/sonazez.pdf
    • http://files.mooreimprints.com/uploads/1/3/0/7/130775025/56bef0.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2340/files/modern_physics_randy_harris.pdf
    • https://cdn.shopify.com/s/files/1/0434/2045/0972/files/digofavowodojasosefanuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/sistem_pemilu_di_amerika_serikat.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/ct-_w4_2016.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/pasovisinafoliginipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/96291652046.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4871/files/20893610113.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/ramasefabobek.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/reading_comprehension_activities.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/wupozujexisivizasutoja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/44978625991.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.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_off00006cf3.bin
29966b7e6cb448643c3f29f5f003631d2c9fcd64cc9afe644c76fc33ff739181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF3 5040 bytes
font_01_sfnt_off00007e00.bin
d33c480ca360dad10917e6d3547c3a232fe08bde8477e2aa6a2bd137d5386ee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E00 10832 bytes

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