Malicious PDF — malware analysis report

Static analysis result for SHA-256 446412175ecfc30f…

MALICIOUS

PDF

42.0 KB Created: 2020-08-23 00:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0ccc5bccb5148a641121b32b0e44efa SHA-1: 5a3f12db0b7382776449e4ae9d2bd0adab599bca SHA-256: 446412175ecfc30fb9da8955c2af06b9e1c9c34d554422ec47c405a1d06b0913
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, 'https://ttraff.cc/pify?keyword=crioterapia+deportiva+pdf', which is flagged as malicious. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves luring users to malicious infrastructure via a deceptive link.

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=crioterapia+deportiva+pdf
    • http://kaweg.highlandtigers.com/uploads/1/3/0/9/130969723/7d1d742e9127c5b.pdf
    • http://files.cgarrodart.com/uploads/1/3/1/3/131383318/3261451.pdf
    • http://files.guybuncecomposer.co.uk/uploads/1/3/2/6/132681823/1864253.pdf
    • http://files.jorgehuertaphotography.com/uploads/1/3/1/4/131438708/2357350.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/297512919.pdf
    • https://cdn.shopify.com/s/files/1/0430/1727/3497/files/bartleby_the_scrivener_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/thermoscan_braun_6500_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/49963917693.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/calendar_2020_kalnirnay.pdf
    • https://cdn.shopify.com/s/files/1/0435/7183/9135/files/zupowasaveduzunazibisesoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/anselm_grn_knyvei.pdf
    • https://cdn.shopify.com/s/files/1/0463/0387/1138/files/78373332116.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1866/files/1_to_1000_numbers_in_english_words.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_off000067ce.bin
13b154797edbc36cf6e15ba87d12e450f2031a5f5e37486713304da4a0fe22be
pdf-font-stream PDF embedded font (sfnt) at offset 0x67CE 4788 bytes
font_01_sfnt_off0000782d.bin
acd29545f7920f3eafa521288b0f11d1d45ad148f0da896a4ff109537fb046ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x782D 10300 bytes