Malicious PDF — malware analysis report

Static analysis result for SHA-256 111050f7d09aa0dc…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 12:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 463f9951ac77690d64e7ee6fa94ff437 SHA-1: 817dfb20698019fe8cf5e057246eb7f8b05d19be SHA-256: 111050f7d09aa0dcb566693097269699cc672b37435ef55e897426b0a16d6900
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to academic PDFs and a URL that mirrors the malicious redirector. This suggests the file is part of a link farm or SEO spam campaign designed to drive traffic to malicious 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=abnormal+child+and+adolescent+psychology+pdf
    • http://kuzevoja.fancyutahyorkies.com/uploads/1/3/0/8/130814328/7561606.pdf
    • http://files.simplyyounutrition.com/uploads/1/3/1/4/131482864/tomosifapiral-bajutolutigi-pilofaro.pdf
    • http://files.pommedapidaycare.com/uploads/1/3/0/7/130739782/namanudopoxijo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/6205/5332/files/books_free_download_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/armor_runewords_d2.pdf
    • https://cdn.shopify.com/s/files/1/0449/8512/2984/files/kangen_water_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/buwazufaxef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ralaguguzovepusumizus.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/45174713241.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0631/files/blind_man_s_bluff_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/sosowufafulevomo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4242/1398/files/befijisilipumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/61467195026.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/72087367130.pdf
    • https://cdn.shopify.com/s/files/1/0431/1882/1530/files/example_of_proposal_letter.pdf
    • https://cdn.shopify.com/s/files/1/0431/7705/0272/files/nace_cathodic_protection_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/tewexazejod.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_off00006112.bin
46f7a5843db4c0d9e46bc5f025a57a7da3c169b2fc8588f3908dcd8d1a8e661e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6112 5800 bytes
font_01_sfnt_off000074ac.bin
36b1b636df6beb56efce0eba0913cea1d6c3e385e2d64c59c548bec28355f0d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AC 9952 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.