Malicious PDF — malware analysis report

Static analysis result for SHA-256 45441d105afc9d32…

MALICIOUS

PDF

64.2 KB Created: 2020-08-26 10:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d92a62639c9175300204fc9b6606d06a SHA-1: e5baa00dfcb4076b08608a915510bb9cf66c927c SHA-256: 45441d105afc9d32ccd4730a54f6438f96d3f5c7c55e0d5a9b50a639e89129c0
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a large number of embedded links to external PDF files, many of which are hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=steins+gate+ending+song', is identified as a malicious redirector. This suggests the document's purpose is to act as a link farm or redirector, potentially leading users to malicious sites or phishing pages.

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=steins+gate+ending+song
    • http://zuzumo.kpollack.com/uploads/1/3/1/4/131454165/5251272.pdf
    • http://kibugob.davehickson.net/uploads/1/3/0/8/130814168/c83ba9a65be7.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6604/files/nih_guidelines_for_acute_asthma_exacerbation.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/voxezux.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/grade_10_math_module_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5798/files/50764003982.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/risariwaniposem.pdf
    • https://cdn.shopify.com/s/files/1/0428/1031/0822/files/21105162444.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/79910412641.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4139/files/jatevagileniwigexeke.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_off0000914c.bin
6f97b4b0b97ed412e070b89585a8edcf158dbeee5ee6420e37da71e6e11602df
pdf-font-stream PDF embedded font (sfnt) at offset 0x914C 5144 bytes
font_01_sfnt_off0000a368.bin
516232b70525e78e6fcddaf112d05b79811993ad3b71a5b8da25f48d02c78911
pdf-font-stream PDF embedded font (sfnt) at offset 0xA368 4968 bytes
font_02_sfnt_off0000b457.bin
1923c201c387a6eef9a4c1e2d2c52a7cbd25a7f78e866c1ede78901afb20bb8d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB457 11924 bytes
font_03_sfnt_off0000dbf2.bin
694cb46132884d6ffec1b1e2f9b970d4d0e25e9dc5ee6178f318000fbb6b07e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF2 17008 bytes