Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc3d4f4254e93cc…

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 22:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fa2d12c1e68c012a8e81e4512ef0413 SHA-1: 45c397efda04ec3e87c747a3851c1984213a2850 SHA-256: 6fc3d4f4254e93cc10347d6e11757f7330c58dece448bde87de1ca7ef9855c06
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though partially corrupted, contains the primary malicious URL. The presence of numerous links suggests an attempt to lure users to malicious sites, potentially for phishing or malware distribution.

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.ru/pify?keyword=honeyguide+bird+and+honey+badger
    • http://vepuvexut.roryward.com/uploads/1/3/0/7/130775540/gimitivi_werarej.pdf
    • http://dajoge.northernfrightsfestival.com/uploads/1/3/1/3/131384240/zekibam.pdf
    • http://files.childproofingcolorado.com/uploads/1/3/1/6/131637043/bopuwusunok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/jedujojanumepilunolenax.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/dugunezixijixila.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/60115529192.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/28201236377.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/741926711.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/error_code_3_spotify.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9018/files/73703936203.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8988/files/free_illustrator_templates_for_infographics.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/lipid_derived_autacoids.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/11156378936.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/2281108024.pdf
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/sudividijowixiv.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f3.bin
ff4e63af6c8c5ced226b8c7c1787d33bbe65e7e002c5b914d40108adc29fb40f
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F3 5080 bytes
font_01_sfnt_off00007b34.bin
22f4fee0d415d2e413e40ddb9fde85cb30afa327f7538e05bf6a9519277560ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B34 10336 bytes