Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a9227393485e68…

MALICIOUS

PDF

44.2 KB Created: 2020-08-24 20:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19af7847320e3b81b206ed13e6584606 SHA-1: 94f2a80810b49a88de8100ba6ab7e8249c2e3dbd SHA-256: 00a9227393485e68a7026511621110b6f15dc32a6583d94d4f7c78a9d397c3e6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate documents but lead to a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=diversity+in+living+organisms+questions+and+answers, which is flagged as a malicious redirector. The document's structure suggests a link farm or SEO poisoning tactic to distribute malicious 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.ru/pify?keyword=diversity+in+living+organisms+questions+and+answers
    • http://files.krista-israel.com/uploads/1/3/0/9/130969791/sapibekufasufop_zabugotumo.pdf
    • http://files.nk-opatija.com/uploads/1/3/1/4/131406149/3614916.pdf
    • http://files.parkviewpanthers6thgrade.com/uploads/1/3/0/8/130814216/49ba015bc36614.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/70475301118.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/81871365899.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/kingdom_hearts_1._5_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/tekejamitisolonizotamad.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/xomafuwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/52782862564.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/57302249604.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/consolidated_report_meaning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/25183016545.pdf
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/degifupijabosuboridimur.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6202/files/biblia_de_estudio_reina_valera_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0438/8323/3448/files/1500369504.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_off00006f04.bin
355121eec2db69029b91e2e906051d95e7ca768ea44744c4d323ea0b12c469c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F04 5524 bytes
font_01_sfnt_off000081c5.bin
7cc384833b533cf452a92c32af41d1c93db9c9d1b4d88635e59eca14e9166e0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x81C5 9944 bytes