Malicious PDF — malware analysis report

Static analysis result for SHA-256 9751a558e8d1063f…

MALICIOUS

PDF

41.2 KB Created: 2020-09-01 05:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1655099e42fc112e2418e933f80d6b6f SHA-1: 646648a81815cbeeec3d72ba38040813aff533fd SHA-256: 9751a558e8d1063f498ba017e0277e56e0dc7b315af7292a3c8318c511adc212
152 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.me'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through these links, with 'ttraff.me' being the most suspicious destination.

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=bssid+full+form
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/elevadores_dentales_numeracion.pdf
    • https://cdn.shopify.com/s/files/1/0436/1519/1202/files/chitralahari_telugu_songs_naa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9842/2934/files/mathematics_syllabus_for_ias.pdf
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/minecraft_steak_id.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/oriflame_catalogue_april_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/xefadapojepepepur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/vevinafajif.pdf
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/not_equal_sql.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/types_of_meter_in_poetry.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/saxovasetuzupezeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/introduction_to_aural_rehabilitation.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6064/files/37167271413.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/nyc_subway_map_manhattan.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/kotor_2_will_work_for_fuel.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_off000064cb.bin
9e4049b494097715e8f834be934fb14eba06bda83035eb0ac682fbea0f1cc3dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 4892 bytes
font_01_sfnt_off0000755b.bin
b4a3f0a0bbe380ffe4735448422561b087b1e98cfe265ac4c98598b63e988f1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x755B 10288 bytes