Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ade3ea0bb9de96…

MALICIOUS

PDF

40.0 KB Created: 2020-08-20 06:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0d6a62269eba5abcd4385511c29ff2b SHA-1: 809c70bf6acaf34949ce884024d150057afbe72c SHA-256: b9ade3ea0bb9de96122da8429b3e4546ee3ef48bc4c674ea3c77089e51188767
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, ttraff.cc, which is known to host malicious content. The document body also contains the same URL, suggesting it is the primary lure. The presence of numerous other links to PDF files hosted on Shopify further indicates a link farm or SEO poisoning attempt to attract users searching for specific 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.cc/pify?keyword=auto+tune+8+free++vst
    • http://files.keepafallenstar.com/uploads/1/3/0/9/130969889/6385142.pdf
    • http://mavapedut.to-condo.ca/uploads/1/3/0/7/130775203/waxevokak.pdf
    • http://files.createddesignsbytammy.com/uploads/1/3/0/7/130739535/6072901.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/deneleguguboxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/wexeladoginujidewitiwif.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/stars_and_galaxies_note-_taking_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/vanozelolojigumodu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/newsletter_template_in_word_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1539/files/42953307712.pdf
    • https://cdn.shopify.com/s/files/1/0435/4415/0165/files/wabiniposefif.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/analysis_of_ordinal_categorical_data_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/5965/9420/files/muwat.pdf
    • https://cdn.shopify.com/s/files/1/0436/3619/5488/files/android_asset_studio_import_svg.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/tewopubipalavojeraj.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_off00005f01.bin
21ccd9d1439ca0d7ee252719599972a3efcca8143497166e3b879f375fecdd56
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F01 4760 bytes
font_01_sfnt_off00006f53.bin
433256af4e9548d575b4675c0d7c4d3fe0097d3178bd77addc1ef051e4382b63
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F53 10536 bytes