Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49afd4fec1c205a…

MALICIOUS

PDF

45.0 KB Created: 2020-08-29 02:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d9c5b553634bf73d1ab2a91668d5dda SHA-1: a33325cec9d23397d3ac88b59726fa437d53897d SHA-256: e49afd4fec1c205ab3cb764f6d99ad4075b0ce9790a0c0c77b271e570156795c
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links. One of these links, https://ttraff.ru/wix?keyword=grammar+and+vocabulary+test+b1, points to known malicious redirector infrastructure. The document appears to be part of a link farm, likely intended for SEO manipulation or to distribute malware via redirects.

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/wix?keyword=grammar+and+vocabulary+test+b1
    • https://static.usrfiles.com/ugd/b8c837_f5f0b8d127c7440aa11bdf2ae9256a3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_114f64670ca74bfea1e12801b3e01b00.pdf
    • https://static.usrfiles.com/ugd/b8c837_2162611fe1b243b7a8ade55af71b7961.pdf
    • https://static.usrfiles.com/ugd/b8c837_3266973cf40d4bb08be5c98beabdb23c.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/livogokukigamogiwunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/accounting_and_finance_for_non_specialists_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9994/files/mukuwujazuxebarag.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/19949925483.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/wrong_turn_part_1_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/2758/5445/files/retarelepikowuvedobiko.pdf
    • https://cdn.shopify.com/s/files/1/0430/4125/9671/files/fexikukaxewupenabof.pdf
    • https://cdn.shopify.com/s/files/1/0432/9318/0070/files/free_educational_institute_website_templates.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/blood_diamond_movie_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/clan_logo_maker.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6088/files/bexagobofinewuwipavazix.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_off00005b5e.bin
d04fd550cf483b141ef6efdf3befdee4fae3705d1a615c11db9542a00429a906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5E 5468 bytes
font_01_sfnt_off00006def.bin
fba14ca3d927b028fa9f113e7a848691ae14e61a6dc6afc15d56da1a860e60ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEF 10032 bytes
font_02_sfnt_off00009077.bin
d525ec757c27fd4f0f01407c814cabcefc53c4c3f117e50a2e9e37faa1a15c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9077 16508 bytes

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