Malicious PDF — malware analysis report

Static analysis result for SHA-256 a349004dc292f040…

MALICIOUS

PDF

46.7 KB Created: 2020-08-23 03:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12ba825f30088ad1d21778b9d7c026ae SHA-1: 0fdcbb06c2a9453cd47c642668899f3e5dd4d146 SHA-256: a349004dc292f040a2ad39bf47bd1f0a43e5d0527d85666bf6ac4f47e7b3290a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary goal is to redirect the user to malicious content, likely for further exploitation or credential harvesting.

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=vagrant+tutorial+for+beginners+pdf
    • http://files.owiinc.com/uploads/1/3/1/6/131606526/xiguvisubakano.pdf
    • http://dipuk.msmorris416.ca/uploads/1/3/1/4/131437987/fisegimivisak-bapikugadab-lewebemobif-morikusero.pdf
    • http://jamev.myurbanhermit.com/uploads/1/3/1/4/131411150/2570912.pdf
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/bg_voz_informacije_kontakt.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/wuvuvijufepapa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9013/1609/files/guardians_of_the_galaxy_2008_team.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/gozenetezujokebera.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/bangla_islamic_book_file_free.pdf
    • https://cdn.shopify.com/s/files/1/0443/5096/3868/files/blight_oils_guide.pdf
    • https://cdn.shopify.com/s/files/1/0445/6343/1588/files/muslim_school_calendar_2020_sri_lanka.pdf
    • https://cdn.shopify.com/s/files/1/0430/6072/3865/files/83649274334.pdf
    • https://cdn.shopify.com/s/files/1/0437/6716/9173/files/resumigax.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/referen.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/xiwapaj.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_off00007872.bin
922ce0256b1630c2840f26975a767218a857342d051fdafed091fbcb21af6d60
pdf-font-stream PDF embedded font (sfnt) at offset 0x7872 5312 bytes
font_01_sfnt_off00008a8b.bin
f4f49e62a14491d3231f5d05ec7f74a72918077f0d701a69f1952a43fc586740
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8B 10224 bytes