Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00760635a924908…

MALICIOUS

PDF

46.1 KB Created: 2020-08-14 01:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 304dcb0583476302a137a86b24d04b0d SHA-1: 7b3741c5bc2cd09f50bff949cfa5a15a647049a0 SHA-256: d00760635a924908462d649bf4889526c1fcaaa3f3d0c8dfa7809a8971ef94b9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `ttraff.cc`. The document body, though heavily obfuscated, contains the same URL and a large number of other URLs, many hosted on `cdn.shopify.com`, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves tricking the user into clicking the malicious link, likely leading to further compromise.

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=adjectives+of+comparison+exercises+pdf
    • http://files.uwlutherans.org/uploads/1/3/1/3/131378771/2718014.pdf
    • http://bekagozim.strotherlab.ca/uploads/1/3/1/0/131070786/998af636930a.pdf
    • http://files.charlieinit.com/uploads/1/3/1/3/131378779/laguvi.pdf
    • http://files.onegatewaycincinnati.com/uploads/1/3/1/1/131164239/nizelozukudaja_gogazuxojuzet_letevo_kajuvexere.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/woxukufebib.pdf
    • https://cdn.shopify.com/s/files/1/0430/4797/7114/files/67271956721.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8848/files/agnosie_auditive.pdf
    • https://cdn.shopify.com/s/files/1/0437/2171/9959/files/bessie_coleman_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69651331918.pdf
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/64837639954.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/xuxexome.pdf
    • https://cdn.shopify.com/s/files/1/0436/3816/1561/files/tratamiento_sinusitis_aguda.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/data_structures_and_algorithms_in_java_6th_edition_goodrich.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/17822066423.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5286/files/kajipenumupuketokekuzel.pdf
    • https://cdn.shopify.com/s/files/1/0440/3537/5254/files/world_war_2_worksheets_for_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/3323529892.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051e1.bin
b01dabe84e4a274f7997b886cef24fd93d51263cb6178618d0cf27192a882ed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E1 5248 bytes
font_01_sfnt_off000063a5.bin
2002b37016e8152e7d33332bdad7adeac47852afbb67294be309598fbb8d26a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 10060 bytes
font_02_sfnt_off00008646.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8646 16060 bytes
font_03_sfnt_off00009adc.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADC 4324 bytes

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