Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65ca8449e569a91…

MALICIOUS

PDF

39.6 KB Created: 2020-09-01 15:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d216c18e703a6ce9dd836ad5bd5afba7 SHA-1: 89b5c9981aa9d06f4722ebcdda5c55cb64d662c5 SHA-256: e65ca8449e569a9171795dbd0887aac94ff28f1fe37643263ae017783a7e807b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to technical manuals and the malicious URL, suggesting a lure for phishing or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

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=ashrae+standard+62.+1+user%2527+s+manual
    • https://cdn.shopify.com/s/files/1/0439/0082/9848/files/ender_3_stepper_motor_specs.pdf
    • https://cdn.shopify.com/s/files/1/0437/8427/4081/files/36365158902.pdf
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/vefumoketufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1746/9080/files/63514721252.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/partes_internas_de_la_computadora_pa.pdf
    • https://static.usrfiles.com/ugd/430cb2_05658ee8939741608e246ad1961c486f.pdf
    • https://cdn.shopify.com/s/files/1/0431/9382/7485/files/metodos_de_la_sociologia_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5403/1270/files/ways_of_the_world_3rd_edition_chapter_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/anatomy_of_fitness_501_yoga_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/boxolixasesuvabudebovega.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/85875953036.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.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_off00004eb9.bin
d76f4b27b3ab23ea065fdfcb4d1673ebd70fe74b21dc555e133479191c78a798
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EB9 5180 bytes
font_01_sfnt_off00006024.bin
af418871517a58a65ffc02f8d532c221bfc2375f22d678357eeb036f02e54b6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6024 10328 bytes
font_02_sfnt_off0000837c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x837C 4324 bytes