Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a829bdfd4db74aa…

MALICIOUS

PDF

51.5 KB Created: 2020-08-31 01:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b84e17a3d243baf2ec480cd5084f473 SHA-1: 203e3bf63b8a97bafb010af7b1caa2415c648e63 SHA-256: 3a829bdfd4db74aa0b6f481aee88a36482fe516c1087c6f7c4c2266790512c76
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to click the malicious link, which is likely part of a phishing or malware distribution scheme.

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.com/wix?keyword=teor%25C3%25ADa+general+de+los+sistemas+ludwig+von+bertalanffy+resumen
    • https://cdn.shopify.com/s/files/1/0433/4610/0374/files/76169492614.pdf
    • https://cdn.shopify.com/s/files/1/0456/4549/6487/files/coral_bracho_poemas.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/gubikakem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/6th_grade_math_common_core_standards.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/adjectives_and_their_meanings.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/vulapigog.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7469/files/bohra_marsiya.pdf
    • https://cdn.shopify.com/s/files/1/0433/6038/7227/files/xovadopoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/category_theory_awodey.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/55196238466.pdf
    • https://cdn.shopify.com/s/files/1/0428/3170/8316/files/79169211720.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/teraxepusorilenibavataz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/banen.pdf
    • https://cdn.shopify.com/s/files/1/0464/5260/5096/files/beko_double_gas_oven_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6016/files/jesse_white_dmv.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4773/files/93392011784.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/essential_university_physics_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0448/6764/9698/files/iso_ts_16949_2009.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_off000078d7.bin
428995a8c96854b396122dc94ca2e552278bc242f0e6c52f2ae4a2ecaeded6d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D7 5508 bytes
font_01_sfnt_off00008b97.bin
a3835ce99d44fe241ebd05e1390cb570215d9b0568343af750278c9571f79553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B97 11100 bytes
font_02_sfnt_off0000af20.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF20 4324 bytes

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