Malicious PDF — malware analysis report

Static analysis result for SHA-256 632e893306f69e20…

MALICIOUS

PDF

41.6 KB Created: 2020-08-13 01:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ea7cdcfcdf8f4cb7f3567eb9645f732 SHA-1: cb80de82cfe5d05b21bbf4ac6ec70678384dbbb1 SHA-256: 632e893306f69e20c42c3277093ebb8506e9978fc613dc9fa370dbb576821e83
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or unknown domains, disguised as academic resources. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ttraff.ru', indicating a known malicious redirector. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=agricultural+engineering+textbook+pdf', reinforcing the lure.

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.ru/pify?keyword=agricultural+engineering+textbook+pdf
    • http://files.artlynch4sag.com/uploads/1/3/1/6/131636845/80904e4.pdf
    • http://files.412studentministries.org/uploads/1/3/0/7/130775557/745dabed6.pdf
    • http://files.whatiwishidlearnedinschool.com/uploads/1/3/0/8/130814706/b5559d0cf9a.pdf
    • http://files.sproutsmyanmar.com/uploads/1/3/0/7/130776485/pofixuzajezeto.pdf
    • http://mosavem.alefrawedding.com/uploads/1/3/2/7/132712615/kimutiko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4115/2406/files/sword_art_online_volume_10.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/36583055085.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/professional_baking_wayne_gisslen.pdf
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/dungeons_and_dragons_5e_character_sheet_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/36650970609.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/56754498113.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/deruwopilawulogo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/halliday_and_resnick.pdf
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/limoxipakazibegirupat.pdf
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/tujepewadojorejafumosidu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/barauni_thermal_power_station.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_off00005789.bin
3c7a738f9c96047468322adc7f933b2d34b02b4865276b1538d085e802ace1fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5789 5404 bytes
font_01_sfnt_off000069fc.bin
b185e4ffb04a448750f2060cae31e2abb5751ce66d4266e80a4cf17c4d5e96d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 15044 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.