Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb912690932584b…

MALICIOUS

PDF

34.2 KB Created: 2020-08-19 04:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7b54f78c5a3ba447395bf2e5696fd29 SHA-1: a97329e9eb0746feffeae1801f6825bc5c7f0317 SHA-256: 1eb912690932584bcf951bbc8f9b0337ecae7e94a1a6d4ab593f4adc9c728317
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links pointing to various PDF documents, primarily hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=caution+safety+sign+template', is identified as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, potentially leading users to malicious content or phishing sites. The ML classifier also strongly indicated maliciousness.

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=caution+safety+sign+template
    • http://jajama.thirdcinemaproductions.com/uploads/1/3/0/7/130775490/1243562.pdf
    • http://files.bayareasurgicalmission.org/uploads/1/3/1/4/131438471/kifijale.pdf
    • http://files.personalgriefcoach.info/uploads/1/3/2/6/132681501/3c49955.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/sniper_elite_3_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/34947780232.pdf
    • https://cdn.shopify.com/s/files/1/0438/9529/2059/files/cisternas_de_concreto_armado.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/hp_2530_24g_poe_switch_j9773a.pdf
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/16975535972.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/wasovozovafogekitema.pdf
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/assessment_definitions.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/anxiety_disorder_dsm_5.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/pesasovedijotemopopes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/50116918698.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_off0000496c.bin
a19b04f33cf70279c6d1315470e8c46dd2e52dfdddd6d7ad0ebb1a9e362b80dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x496C 5132 bytes
font_01_sfnt_off00005ae2.bin
4f826bbdfff9e45788f1cf6afedd3b26653576b74cb60a1100037bdfac2e3590
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE2 9868 bytes