Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c2387eca6bb533…

MALICIOUS

PDF

36.1 KB Created: 2020-08-08 15:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b540b00c4e5d59b5f8f1719a1bca10ed SHA-1: 39f40a54cacfefd565c53ae3b5761bc6dc7b743b SHA-256: 11c2387eca6bb5338dff6aa8fba8f63db80e06973c3946e6c14a3d4135d1a08a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious sites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'ttraff.com', indicating an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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=wordly+wise+book+5+lesson+10+pdf
    • http://kixukazaz.moanalipopo.com/uploads/1/3/1/3/131383664/xemakopisetajof-lilut-bakozakoxotunob.pdf
    • http://files.kathyloureyes.com/uploads/1/3/0/9/130969297/delupa_sufel.pdf
    • http://files.dakotaashleymarie.com/uploads/1/3/0/7/130738970/tuvovalerofo-nukureguvexadij-nebolis.pdf
    • http://zejamubuz.stseraphimkamp.com/uploads/1/3/0/8/130814297/3402106.pdf
    • http://lumat.martinebailey.com/uploads/1/3/1/4/131408899/4320244.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/34748444623.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/konapube.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/35891922537.pdf
    • https://cdn.shopify.com/s/files/1/0436/6961/8841/files/tefusurobax.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/green_eggs_and_ham_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/87852316198.pdf
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/59534877586.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/14381714124.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/suvikafuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/principles_of_econometrics_hill.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/1393904678.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/16335420490.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/xejuvazukajudel.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_off00004f4a.bin
4c11634338116af8d8b127d023f3eeae5cccc62ef0c5938a1a5a84a60be60aff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4A 5552 bytes
font_01_sfnt_off0000626b.bin
41651397053f1f826d70ee342f45f7707ab7a31828094fa3affa2f1bf5346e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 9800 bytes

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