Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ee5c42835336e2…

MALICIOUS

PDF

48.0 KB Created: 2020-09-04 21:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30a81cf5f27d579afeaa6e50d7e56870 SHA-1: 0c971be40c96591d2677170e8aceb5055abca187 SHA-256: 51ee5c42835336e26f5560d0cb911d63a3e831bffc97628552b24fdfabc33159
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.club', suggesting a link farm or redirection scheme. The document body, though heavily corrupted, contains the text 'Reporter tv careers' and the malicious URL, indicating a lure for users interested in job opportunities. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.club/wix?keyword=reporter+tv+careers
    • https://static.usrfiles.com/ugd/843280_061be7d6a61c4c0ca7bb78beb03b5d13.pdf
    • https://static.usrfiles.com/ugd/04c368_4a475e9cb8aa426da3434e1f9c91af4e.pdf
    • https://static.usrfiles.com/ugd/4a6c57_57224aeca2e94730a77a4508373980e2.pdf
    • https://static.usrfiles.com/ugd/64f9d2_dc954940599f42ffb2c8b61cee124417.pdf
    • https://cdn.shopify.com/s/files/1/0447/4263/9765/files/bleeding_time_test_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3476/files/cactiez_10._1.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/final_fantasy_1_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/7571/5743/files/potty_racers_3_unblocked_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/54370202961.pdf
    • https://cdn.shopify.com/s/files/1/0439/1596/8667/files/mathematics_2nd_year_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2403/files/17317350051.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/41653355808.pdf
    • https://cdn.shopify.com/s/files/1/0465/3200/1950/files/36975693773.pdf
    • https://cdn.shopify.com/s/files/1/0430/9352/4637/files/pitipawij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakorijupomimenupe.pdf
    • https://cdn.shopify.com/s/files/1/0461/8980/5731/files/wugukuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/odisha_news_paper.pdf
    • https://cdn.shopify.com/s/files/1/0446/9476/5724/files/4421392649.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_off0000689c.bin
d24880f9fca3740d5285681a803bdcc5202ce9d77271169fa90d93ae9c945c9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 4964 bytes
font_01_sfnt_off00007999.bin
9891df4fda9ac65f35af9699f4ca1e14799ce7386318d48ae99be4478f3057cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7999 10536 bytes
font_02_sfnt_off00009dcd.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCD 16164 bytes

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