Malicious PDF — malware analysis report

Static analysis result for SHA-256 5933c40b5d1ce57a…

MALICIOUS

PDF

40.8 KB Created: 2020-08-03 21:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8269422da0a8b7dcce25024b68b7a9c SHA-1: 34db19d17384cc4877693a2b9b0f89505c83ebec SHA-256: 5933c40b5d1ce57a291a98bbf4a77029fe611b69c949d9f00dcf31ba2a016738
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded link structures reveal a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm or redirection scheme. The primary malicious URL identified is https://ttraff.com/pify?keyword=alarm+lock+dl2700+template+pdf, which likely serves as a gateway to further 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=alarm+lock+dl2700+template+pdf
    • http://files.johnschroedermusic.com/uploads/1/3/0/7/130775017/8e243f83ef8.pdf
    • http://files.elbeephotography.com/uploads/1/3/2/7/132740763/6dca1cada7f.pdf
    • http://divuk.kossecc.org/uploads/1/3/1/6/131636855/pekinimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/16960945035.pdf
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/extract_audio_from_mp4_without_transcoding.pdf
    • https://cdn.shopify.com/s/files/1/0439/3179/5624/files/nedovifedubali.pdf
    • https://cdn.shopify.com/s/files/1/0434/5492/2902/files/76215654881.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/marcy_platinum_home_gym.pdf
    • https://cdn.shopify.com/s/files/1/0440/8092/2789/files/2002_honda_accord_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/niziwidexusinorup.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/9064965432.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/walezilufotalenuzodumis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1484/7655/files/2272770864.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_off00005817.bin
808b13e1827d55c833bea5c5970fb4d9f6f51c8c3397ce20c203d87a1b58c5d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5817 5532 bytes
font_01_sfnt_off00006adc.bin
b07352863e84b42eb5c3cb7f5e571a88fae6a8a0c7b92380e13715fd95364b03
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADC 13952 bytes