Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec114abe49e26ced…

MALICIOUS

PDF

45.3 KB Created: 2020-08-26 02:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10ecc3f1ae85172cf12feb602fb85793 SHA-1: 31986e108ec49e4c3da9f06737475e57fb6f4d15 SHA-256: ec114abe49e26ced24028ee9fc630f43603469e17086d31b3439c3e1041bf4a8
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/pify?keyword=groove+tubes+vipre'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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.me/pify?keyword=groove+tubes+vipre
    • http://files.mcloughlansupplies.com/uploads/1/3/1/3/131380985/fobos.pdf
    • http://files.clomudrik.com/uploads/1/3/1/3/131382330/f5b60b510.pdf
    • http://wawir.theperfectpairdolphintrilogy.com/uploads/1/3/0/8/130874493/mineder_vosapanujo_tanuweso_rogux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7182/files/16424704711.pdf
    • https://cdn.shopify.com/s/files/1/0433/7185/6026/files/64377493271.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/5748119209.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/sujofebugiligixiletabuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/36066061010.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2988/files/sadezonenigerime.pdf
    • https://cdn.shopify.com/s/files/1/0432/2227/0114/files/fubatogusogukizofovixuva.pdf
    • https://cdn.shopify.com/s/files/1/0430/5341/6601/files/31519894775.pdf
    • https://cdn.shopify.com/s/files/1/0440/3927/4646/files/event_schedule_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0462/8489/8464/files/bamboo_sheets_king_sale.pdf
    • https://cdn.shopify.com/s/files/1/0432/0942/5056/files/editorial_articles_examples.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_off000075a0.bin
380acf2ef3b5826cc2db6484d27611aee4481af8f2513f8d50ad9cf1dd62ee0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x75A0 4800 bytes
font_01_sfnt_off0000860d.bin
e4652bed2b8e772c64c6e999270e26fa05d4ce4c5a1aaeb912c511dae1971cad
pdf-font-stream PDF embedded font (sfnt) at offset 0x860D 10180 bytes