Malicious PDF — malware analysis report

Static analysis result for SHA-256 048406b472f74901…

MALICIOUS

PDF

53.6 KB Created: 2020-09-03 00:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4fe00895dfdd07ecfa8d2d91be3c0d2 SHA-1: 5f2deb653b9654f0f7770d07595d178301e49953 SHA-256: 048406b472f74901e27cc7f66c45666cd65b3b0854531e7a7962ed639650a2a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to a malicious redirector and a large number of external PDF links, suggesting a link farm or SEO spam tactic. The embedded URL `https://ttraff.cc/wix?keyword=cambio+climatico+y+sus+causas+pdf` is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent.

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.cc/wix?keyword=cambio+climatico+y+sus+causas+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_5def78df6d9a4c24803373e69d6f63c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_321e63a406674f84b0232b4cc4073adf.pdf
    • https://static.usrfiles.com/ugd/2ddd39_2d2fd5bb472a49409c3878303bd93517.pdf
    • https://static.usrfiles.com/ugd/cc207a_76924215484b4231804737e258c8abff.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/tagagukajinudelujedonez.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/hierarchy_of_needs_according_to_abra.pdf
    • https://cdn.shopify.com/s/files/1/0429/3653/3151/files/lipid_oxidation_challenges_in_food_systems.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7206/files/bullet_bet_predictions_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/beerappa_audio_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2508/files/thank_you_letter_template_for_elementary_students.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/22038376514.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9696/files/vocabulary_words_with_urdu_meaning_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/nujexewegibozududemev.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/47674233650.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090a0.bin
243f9b683ebc3df1de685e1b832cc3d55a3ad265b569ca1c90cc42085774fff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x90A0 5352 bytes
font_01_sfnt_off0000a2c9.bin
010beb5edecf9f8c14ce9955ebb0cff35c050c044ca388c4d76a19a4a4194a1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C9 11368 bytes