Malicious PDF — malware analysis report

Static analysis result for SHA-256 7497bfee9233de35…

MALICIOUS

PDF

41.9 KB Created: 2020-09-10 09:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 335f4daa416f5637e6629135ed95f60e SHA-1: ba2e9f5ffca555b945ff37ab9e5dc40acd3ba546 SHA-256: 7497bfee9233de351f9bf93029f624d4e97e0885760c8446ec65a4b8d9e27c87
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of these links points to a known malicious redirector, and the document body itself contains a mass of external PDF links, suggesting a link farm or redirection scheme. The primary intent appears to be directing users to malicious content through these links.

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.me/wix?keyword=vidmate+app++hd
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/netikifubuwetaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9809/6284/files/free_social_media_calendar_template_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/5484/0485/files/chicago_pd_season_6_episode_10.pdf
    • https://static.usrfiles.com/ugd/0d002d_5368b5e2cd5c4d118992892fa063990c.pdf
    • https://static.usrfiles.com/ugd/1479de_af434db4bb20496da35eb1f81c46519d.pdf
    • https://cdn.shopify.com/s/files/1/0439/3402/3848/files/navuzaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/adobe_premiere_pro_cs6_32_bit_free_download_with_crack_bagas31.pdf
    • https://cdn.shopify.com/s/files/1/0435/3402/4855/files/comptia_network_n10-_006_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7607/files/rapirovoxisuluzuro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4715/files/awk_programming_examples.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/bukufod.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_off00005e6e.bin
cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6E 2952 bytes
font_01_sfnt_off000068fd.bin
6b3e07a71c5f3ac84346fb2c16ff00c6e08d2acf24f2d256757c26feb4eaad39
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FD 4856 bytes
font_02_sfnt_off0000795a.bin
292502fd0919af7364376eb97f65a2a5259bfc4debf8b243e429acdd35eee1af
pdf-font-stream PDF embedded font (sfnt) at offset 0x795A 9904 bytes