Malicious PDF — malware analysis report

Static analysis result for SHA-256 396cbc6ce9aa7030…

MALICIOUS

PDF

42.5 KB Created: 2020-08-23 03:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e129facae56e179b9f9eba4099d5d584 SHA-1: 4dfed2fef50922c05e9c8d14ab2d340b770f876e SHA-256: 396cbc6ce9aa7030cc7b86af3334d800736c5a776713056dfac91a50bcec25f4
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate documents but likely serving as a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=chrome+app+for+pc', suggesting the document's primary purpose is to lure users to click this link. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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=chrome+app+for+pc
    • http://files.rebeccasacksmezzo.com/uploads/1/3/0/9/130969717/9893055.pdf
    • http://files.destinyhouseministries.org/uploads/1/3/0/7/130776401/7458330.pdf
    • https://cdn.shopify.com/s/files/1/0433/8941/9676/files/59073903316.pdf
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/78044156954.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/manual_de_usuario_sisbe_banco_de_venezuela.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/zakubuxig.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/4_times_tables_printable_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/0783/4272/files/puwipadosasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3716/files/zelilozurosurizodit.pdf
    • https://cdn.shopify.com/s/files/1/0463/2025/5138/files/diberi.pdf
    • https://cdn.shopify.com/s/files/1/0464/5286/7240/files/ruxirut.pdf
    • https://cdn.shopify.com/s/files/1/0432/9344/2208/files/reformas_borbonicas_economicas_en_america.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_off00006953.bin
c62e2c546145799e8dbe230e3ea99d571f56efec8f88afe5919fc44d7e099edd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6953 4952 bytes
font_01_sfnt_off00007a03.bin
9fdfea164e600975e3a7c5ab746e2ae05010dc351d5dae2765b6b67a4d4f1bfa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A03 10556 bytes