Malicious PDF — malware analysis report

Static analysis result for SHA-256 21383dacf714f06d…

MALICIOUS

PDF

35.4 KB Created: 2020-08-19 18:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 081d61d5c44e468ce3145088a72abbcc SHA-1: 96ae2164893b8d78823ed96ca0da096963add62a SHA-256: 21383dacf714f06d5133366e561abad2d4c124a781578859e6672984a6d0c7bc
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=anti+terrorism+shooter+game++apk`. This indicates the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. The presence of a large number of embedded links, many hosted on `cdn.shopify.com`, further supports the link farm tactic. The ML classifier also strongly flagged this PDF as malicious.

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=anti+terrorism+shooter+game++apk
    • http://files.elawithlawson.com/uploads/1/3/0/7/130775223/kagaj-tifazedalodofos.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/wikogaxizodizidonenur.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/towemabamitiloxetexodapuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94192334972.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/62178627018.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0422/files/77938390649.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/4838663402.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/91496441480.pdf
    • https://cdn.shopify.com/s/files/1/0438/8601/8712/files/minecraft_songs_redstone_active.pdf
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/41148971435.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9762/files/gikeniwobude.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7189/files/96996921090.pdf
    • https://cdn.shopify.com/s/files/1/0438/3201/7058/files/retanadati.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_off00004b72.bin
0f9db7e00439d99b360d99ef904406faf15296c8951b9223e99ee36006d636dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B72 5256 bytes
font_01_sfnt_off00005d24.bin
35a584f75ba31cb2a508cb7f0ac3ce4c9625ee4d8de9bdac6f254003553efda0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D24 10440 bytes