Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c090a81d57cb8a…

MALICIOUS

PDF

49.5 KB Created: 2020-08-17 00:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df67fa8b3bcd0f33b461896624b59b73 SHA-1: e9fe92198149f09d3358274a0520b179671646b0 SHA-256: 22c090a81d57cb8a5caf5a57d8299a54bf62704d803c66e24efc9bb847f0704a
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to Android development and the URL https://ttraff.cc/pify?keyword=set+layout+background+programmatically+android, suggesting a lure to a resource that likely leads to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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=set+layout+background+programmatically+android
    • http://ralirop.greenlightcreative.com.au/uploads/1/3/0/9/130969059/babezilipowoxogelok.pdf
    • http://files.nicolefranz.com/uploads/1/3/1/3/131380870/3047437.pdf
    • http://files.whitepinesestate.com/uploads/1/3/0/9/130969368/8534914.pdf
    • http://files.64trainingsystems.com/uploads/1/3/0/7/130776204/0af3518f200fc.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/24690147962.pdf
    • https://cdn.shopify.com/s/files/1/0430/6419/7273/files/fisatasaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/66315267706.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/metallica_hardwired_to_self_destruct_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0447/9749/3405/files/roman_catholic_bible_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/8228/4194/files/87714297464.pdf
    • https://cdn.shopify.com/s/files/1/0432/7568/1947/files/adagio_baermann.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/lsat_analytical_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/75120141108.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/m41_bus_timetable.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d26.bin
346dff074c187e856c75d3a6343ff30e96db5ab80df88dcf0b6d0f00623ec86f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D26 5624 bytes
font_01_sfnt_off00009033.bin
e9c770dc150a90aa52a727950e16b0d06731d036ba8a8afd7aa001f962adaf13
pdf-font-stream PDF embedded font (sfnt) at offset 0x9033 12276 bytes