Malicious PDF — malware analysis report

Static analysis result for SHA-256 78fbb27087ac10a6…

MALICIOUS

PDF

45.1 KB Created: 2020-08-10 00:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b27df6faf72788f0a18ab9a35f4c4a46 SHA-1: da86acd60c5773d5bd09e8203d6cbeee5d9f397d SHA-256: 78fbb27087ac10a671993d0055149e5a1106ef98615b9cbc85d86aadf3007d57
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. The primary malicious link, 'https://ttraff.ru/pify?keyword=texto+argumentativo+y+sus+caracteristicas+pdf', is identified as a known malicious redirector. The document's structure and the presence of numerous links suggest an attempt to manipulate search engine rankings or to distribute malicious content through a link farm, ultimately leading 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=texto+argumentativo+y+sus+caracteristicas+pdf
    • http://lexafasu.parentshirts.com/uploads/1/3/1/0/131070161/vevovizenemo.pdf
    • http://files.cullensailworks.com/uploads/1/3/2/6/132695986/mukixoti.pdf
    • http://files.cathermanslandscaping.com/uploads/1/3/2/7/132740533/xofedozapezinusimu.pdf
    • http://files.gateaumarche.com/uploads/1/3/0/9/130969499/5690647.pdf
    • http://dejeraj.ozarkmountainridgerunners.org/uploads/1/3/1/3/131383483/linogepepaluz-vutodalibet-dekuwawevimi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/7576/8221/files/auriculotherapy_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/8913043926.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6351/files/dutotomumejajuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/davegarovifako.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/wapakiberel.pdf
    • https://cdn.shopify.com/s/files/1/0430/9899/6889/files/werilanele.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/85148209770.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/python_run_shell_command.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/segujasuraxubepagodawufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/ketogenic_diet_food_list_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/63914215110.pdf
    • https://cdn.shopify.com/s/files/1/0434/8510/2237/files/2666200947.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_off00006ee3.bin
d6f0338340772f2570c65c6e3b017daa9a2e4527db7c43f6051777454f3fb5d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE3 5624 bytes
font_01_sfnt_off00008201.bin
9f2a084b60c5eaeab31aaa8bf32681b3ab98079f89ad6bb68ea807f4d9b0b0cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8201 11020 bytes

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