Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8d138bc91f5d88…

MALICIOUS

PDF

50.2 KB Created: 2020-08-19 05:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f07684c32da7e76ad14580e02e28876b SHA-1: f3b97a1fd9fcdd4a14138d52feecd0fc283a0c4f SHA-256: bd8d138bc91f5d88849671020737c7565d7c4592c75c850b57da6cb3308b2e96
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the URL and the heuristic firings suggest a likely intent to redirect users to malicious content or to manipulate search engine results through a link farm.

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=alexandre+desplat+new+moon+sheet+music
    • http://files.coffershousingsolutions.com/uploads/1/3/2/6/132695213/bazajab-dateruripol-jesewagij.pdf
    • http://files.lbjixxerstudio.com/uploads/1/3/1/0/131070525/9f22f.pdf
    • http://files.trinitybergenlutheranchurch.org/uploads/1/3/1/3/131379320/7210037.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/wawimumilixiboravibezoluw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/tepisa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2453/files/54843059207.pdf
    • https://cdn.shopify.com/s/files/1/0430/7841/8583/files/gajobewuditopubok.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/sonenazilulenowebekoraguk.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/93054705621.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2337/files/grams_moles_calculations_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/apollonio_rodio_argonautiche.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/1101293795.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1799/files/getoxesoguroxowuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/auralic_aries_g1_user_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061f4.bin
ea5efac7988dc21edb116e7cc40fcceaf055abf5fc05e2ce1c6821bd108eef8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F4 5872 bytes
font_01_sfnt_off000074eb.bin
03c82cdcf7c01be3daea9aaf73460b6f5a00babb1c54e16233ebd4aa548b30f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EB 5460 bytes
font_02_sfnt_off00008764.bin
b31d161f5bfc3e8e7dba903abe8a9fdd68bef64beecc0c78f8d4e3740a8fd419		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8764 8544 bytes
font_03_sfnt_off000097f3.bin
700b36260cb7a7abaadc8863b412cb0224f91b3fa8f0fb1bec20eb91886f90bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97F3 9768 bytes

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