Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecedc33e6b3b0032…

MALICIOUS

PDF

41.2 KB Created: 2020-08-07 10:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16b26fb152f2a4c1a81055fa3dac192d SHA-1: b9fe301f0304f31fb022b61a71e285bd16c3e62d SHA-256: ecedc33e6b3b00324db46f9a79b79c1ab787c8f3b6d9a0dfb2eccc785e54da36
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=chart+patterns+forex+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the intent is to lure users into clicking through to potentially harmful content by disguising it as a forex trading guide.

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/pify?keyword=chart+patterns+forex+pdf
    • http://files.poguessports.com/uploads/1/3/1/6/131606819/lejudijajo.pdf
    • http://wonidaz.kellywriteswords.com/uploads/1/3/1/4/131482995/1343164.pdf
    • http://files.stonesj.org/uploads/1/3/0/7/130738794/gojakofusawu-dosazulon.pdf
    • http://files.zforschools.com/uploads/1/3/2/6/132680781/zugazopajimodo_vanewexum_vuvaxuvubud.pdf
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/discord_can_t_hear_others.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1853/files/causas_de_la_contaminacion_del_aire.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/65571205113.pdf
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/robotic_process_automation_with_blue_prism_quick_start_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/repamonajotijodotaxojexiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/2406900016.pdf
    • https://cdn.shopify.com/s/files/1/0434/6180/4198/files/71929087587.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/21769291751.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/2000_honda_accord_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/4728/1062/files/shopping_mall_interior_design.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2867/files/nabuposizefadum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xewujixamugovaginebutomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/29385960198.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_off00006468.bin
a4e46f8b89a57f7ac65ce2630ff6687d71151bbf6cb69615429dae4d9f3c4622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 5068 bytes
font_01_sfnt_off0000759d.bin
9544a1b09f0094c47d1182222cae3e7eeb0de0554935675178be99f57f98995a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759D 10032 bytes

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