Malicious PDF — malware analysis report

Static analysis result for SHA-256 807cd8203d91515a…

MALICIOUS

PDF

52.6 KB Created: 2020-08-21 22:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93808056e1ea437de49405a86154fa30 SHA-1: bba68ba445903a74cc61b977ccada58110e430b5 SHA-256: 807cd8203d91515abd61215f6b06e54d2e42350683a323af8850e5fbf6043752
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded URL 'https://ttraff.cc/pify?keyword=medieval+2+total+war+unit+guide' is likely intended to lead the user to a malicious site. The document body, though partially corrupted, contains references to the lure and the malicious URL, suggesting a phishing or redirection attempt.

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=medieval+2+total+war+unit+guide
    • http://files.absterpokemonshop.com/uploads/1/3/2/7/132711999/872049.pdf
    • http://files.thelovelyphotographers.com/uploads/1/3/0/7/130776126/3611084.pdf
    • http://files.cactusgems.com/uploads/1/3/1/6/131606672/detotugex.pdf
    • http://mesunida.spacetimedance.com/uploads/1/3/0/7/130738731/8130616.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/list_of_us_cities_by_population.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/jebufogiz.pdf
    • https://cdn.shopify.com/s/files/1/0436/2423/5170/files/basic_of_c_programming_language_tutorial_filetype.pdf
    • https://cdn.shopify.com/s/files/1/0447/1803/1001/files/hooked_on_phonics_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/56298512928.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/9686798500.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80789229335.pdf
    • https://cdn.shopify.com/s/files/1/0437/7260/8663/files/sudimudipenafuruwaf.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_off0000918c.bin
6479970ba2f87c7171014c58dc947f2707523676abb31416075bb987a77788db
pdf-font-stream PDF embedded font (sfnt) at offset 0x918C 5104 bytes
font_01_sfnt_off0000a316.bin
65c9de0b7fb9927221b61187ab4d06595091c3484870d2a8c4d5adc12dc00ce8
pdf-font-stream PDF embedded font (sfnt) at offset 0xA316 10204 bytes