Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2a3458c6fd40a5…

MALICIOUS

PDF

39.2 KB Created: 2020-08-27 14:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcd8c6c69d409b441b82627bf2d22c69 SHA-1: c19beb0e8586241022a3a12f3b5e9b22f6591149 SHA-256: ba2a3458c6fd40a56d7c7932825b0a6d55c3220af90ac8837bcc46a53a6ceb23
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and heuristics indicating malicious redirector links and a link farm. The document body contains numerous URLs, including a suspicious one pointing to 'ttraff.cc', which is identified as a known malicious redirector. The presence of a large number of embedded links suggests an attempt to distribute malicious content or manipulate search engine results.

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=past+simple+verb+to+be+affirmative+negative+interrogative+exercises+pdf
    • http://files.winningtimefarm.com/uploads/1/3/0/7/130776423/xesofunofevuj.pdf
    • http://files.daniellebschwartz.com/uploads/1/3/1/0/131070688/xoterowivi-jirapoluveg-sumerezi.pdf
    • http://files.revemicroblading.com/uploads/1/3/1/8/131856725/4273704de612dc0.pdf
    • http://files.kajakeriet.com/uploads/1/3/1/6/131637163/sifoguvobe.pdf
    • http://xowinune.williamdikel.com/uploads/1/3/1/4/131453698/8102155.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2341/files/hello_hello_bolke_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0899/files/nematodes_parasitology.pdf
    • https://cdn.shopify.com/s/files/1/0460/4172/7140/files/fitijot.pdf
    • https://cdn.shopify.com/s/files/1/0464/6328/7448/files/distrofia_ungueale_canaliforme.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/cowboy_bebop_tank_clarinet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/63518834156.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/el_camino_del_guerrero_pacifico_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/powtrka_czasw_angielski_wiczenia.pdf
    • https://cdn.shopify.com/s/files/1/0430/4083/3690/files/dokimadakenivoganamupaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/52756780862.pdf
    • https://cdn.shopify.com/s/files/1/0459/8179/4471/files/esl_adjectives_to_describe_personality.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1849/files/belinagiwutowemu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1304/files/friendship_images_tamil_hd.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/potikalekuzabesaxafolumi.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_off000057c9.bin
11f17ad0813815585730130d0958a8eb883ac8f15c7d56b758c45a5ce716e626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C9 5744 bytes
font_01_sfnt_off00006b40.bin
867ca2693ab7798e1d46a0586c37237f3611a3e388b3fa743d99caae5add9dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B40 10572 bytes

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