Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19ca2093e9bad45…

MALICIOUS

PDF

45.2 KB Created: 2020-08-31 15:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e61449ec59d9aeb6fed4756ec72d81a7 SHA-1: 96e12f4cf09d68733a466a891c9417449b6a86a0 SHA-256: d19ca2093e9bad45d582bb12732c1009632bb3fec473266afa63da5b05df27a7
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 'ttraff.com', which is used in conjunction with a lure related to 'Dead by Daylight PC utorrent'. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. 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.com/wix?keyword=dead+by+daylight+pc++utorrent
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/50349474133.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4731/files/mlb_the_show_19_trophy_guide_powerpyx.pdf
    • https://cdn.shopify.com/s/files/1/0436/9298/2427/files/1000_creative_writing_prompts.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/nshm_kolkata_course_fee.pdf
    • https://static.usrfiles.com/ugd/81d6a4_0046278daaec45f88d61fe401902de0b.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_157c906a7f274283923758aa26bb405a.pdf
    • https://static.usrfiles.com/ugd/e8506d_0c2c8a15684249ccaa8aeb395e4b9b8c.pdf
    • https://static.usrfiles.com/ugd/bf650e_0f250450d74945df8e5c5cd2108b370b.pdf
    • https://static.usrfiles.com/ugd/6d59ab_61e62caad9f9468fa2c6b0cc0359deff.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/village_baseline_survey_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/35582336082.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/piano_chords_songs.pdf
    • https://cdn.shopify.com/s/files/1/0438/9611/1259/files/rusog.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/cdc_influenza_treatment_guidelines_2019.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_off00007377.bin
0218a5f9513e5bcc6ae61edae1e97e8e32dcbdcb286f3f5c5af9fdfe81fbf800
pdf-font-stream PDF embedded font (sfnt) at offset 0x7377 5400 bytes
font_01_sfnt_off000085d4.bin
24e1605a02424ca4758d928cbc62fe7d73af275c5afe1b8edb4fafc8945f4da4
pdf-font-stream PDF embedded font (sfnt) at offset 0x85D4 10024 bytes