Malicious PDF — malware analysis report

Static analysis result for SHA-256 715e27686651dd67…

MALICIOUS

PDF

39.7 KB Created: 2020-08-21 12:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bce993553ee402c37d8673d2097161bf SHA-1: ddf79204cb96e717bc14ec042125ddcdb765fe1e SHA-256: 715e27686651dd67796fb31162fa88f8f5c0f79b6f7fa855afd8383464b4178f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ncaa basketball 10 ps3' and a URL that appears to be part of a link farm designed to attract traffic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to harmful sites.

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=ncaa+basketball+10+ps3
    • http://files.sanluisrestaurant.com/uploads/1/3/1/0/131070722/9f2d2c31d6f20f.pdf
    • http://files.agcompa.com/uploads/1/3/1/8/131857758/zirome.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/sepejakibaxan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/fadezesivesizesomaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/what_is_lg_usb_modem_driver.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/jotusizidanoditugaxon.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2805/files/main_function_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0454/3217/6808/files/character_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/maths_ncert_question_answer_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/mukevixipalafez.pdf
    • https://cdn.shopify.com/s/files/1/0433/7935/9900/files/adobe_after_effects_free_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/37294811977.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/kojufajekafiwekaduzaxu.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_off00005b69.bin
a3a3568f3ded1937b3a7e476d253737b45f944426aa620fc60b472ce9c5968e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B69 5364 bytes
font_01_sfnt_off00006db6.bin
03b8449427659332103707a936a042944809aac76892848275e0a897960ee40a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB6 10648 bytes