Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d75e9b2b4f59e71…

MALICIOUS

PDF

44.1 KB Created: 2020-08-24 02:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 246ee95c12ec08e840bd7c9ada2c6a18 SHA-1: 9d1a4cd6c6f1a6f11b597bb74f5d89724b09ecb0 SHA-256: 9d75e9b2b4f59e71bdb3caf9be2aee1baec84be74215ab92ec5fd29348a1f05f
154 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The presence of a link to 'ttraff.com' suggests an attempt to lure the user to a malicious site, potentially for phishing or malware delivery. No scripts were extracted, and the document body was heavily obfuscated.

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/pify?keyword=il+cervello+anarchico+enzo+soresi+pdf
    • http://kipilomod.stwilliamparishwigan.org/uploads/1/3/1/3/131383548/dorolawarajetus_raziz.pdf
    • http://zonutevef.manontheearth.com/uploads/1/3/1/4/131438641/bc7e7c15.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/49958487129.pdf
    • https://cdn.shopify.com/s/files/1/0431/6967/7474/files/va_form_10_2850a.pdf
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/86331679375.pdf
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/academic_writing_and_presentation_skills.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/sogixasidufolebadubul.pdf
    • https://cdn.shopify.com/s/files/1/0440/4147/0117/files/vurogododarikakiwinosufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/73518470129.pdf
    • https://cdn.shopify.com/s/files/1/0437/5927/2090/files/fanedif.pdf
    • https://cdn.shopify.com/s/files/1/0428/8125/3535/files/dososasew.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/descriptive_statistics_book.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_off00005ff5.bin
e2b6feb6988489233e79bc2ad3fb6c428fb64ae87a874ea5fd365d5e5d53c8e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF5 5000 bytes
font_01_sfnt_off000070da.bin
7a8f88935c5516a5f3c19376049ecdb6cc8fcd2f89f3df866bb5cfc2400992c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x70DA 10832 bytes
font_02_sfnt_off000093f0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x93F0 4324 bytes