Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1d1fc6dfb0e6fb…

MALICIOUS

PDF

54.1 KB Created: 2020-08-23 09:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3754b6da4aadc5e815439e0551aaf6d3 SHA-1: 9f2c5d5bd46a5ef2eca20cdb9b5fb601d7191767 SHA-256: dc1d1fc6dfb0e6fbed3d0c8b284e05bbba1795d68c5b3a0cee8bee0b31153537
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=karuppasamy+dj+remix+songs' which is flagged as malicious. The presence of a large number of external PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=karuppasamy+dj+remix+songs
    • http://files.soccercolony.com/uploads/1/3/1/3/131379060/lukufezevafino.pdf
    • http://xotut.ittakesavillageys.com/uploads/1/3/0/9/130969130/5053889.pdf
    • http://samakegot.healthyskinabc.com/uploads/1/3/1/3/131383544/dovojusegesej.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/lugumisifosapi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1149/6343/files/65035604425.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/62338041951.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/30460850350.pdf
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/wutanemozatiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakoximowukod.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/14962757110.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/final_fantasy_14_dps_meter.pdf
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/zibereken.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/financial_performance_analysis_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/8864/9123/files/wikajejatuvis.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4383/files/74549934113.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_off000064ab.bin
89309b73155a511f0e04f70d7051ec4c8f4a02484fc23aa0f9535b5348461e9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AB 5464 bytes
font_01_sfnt_off00007748.bin
ba088923171ee8b68065b9f402589cd3134e8ea320f649726c054a6916e6aa18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7748 11904 bytes
font_02_sfnt_off000095c3.bin
0d99920604c987ea8e2d59508795b63e1d9eddc46f728d2906f6fb3d29e52a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C3 1872 bytes
font_03_sfnt_off00009eaf.bin
4640919377073795948f9723f89bf3d55022dfa111fdd9ffa8b5864e768cd133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EAF 14280 bytes

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