Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d8989500724982…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 08:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6e91bf67ad818c29f204a790d0b37d6 SHA-1: 41fa476ec5aa41d8f1d6e4c2d1737196c9fefac1 SHA-256: 26d89895007249828f811a8344c99110d7116f3270bac4e1936643c8c8aee4a2
152 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 point to a redirector service. The document body, though partially corrupted, suggests a lure related to a 'free ancient aramaic bible in english pdf'. The primary malicious URL identified is ttraff.cc, which is flagged as a malicious redirector. The ML classifier strongly indicates maliciousness, and the overall structure points to a link farm attack 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.cc/pify?keyword=free+ancient+aramaic+bible+in+english+pdf
    • http://files.beyouclothingcollection.com/uploads/1/3/1/3/131380337/7104756.pdf
    • http://files.andymeyers.info/uploads/1/3/0/8/130814605/wejupuxozo.pdf
    • http://files.emkdgenealogy.com/uploads/1/3/1/4/131453250/4991405.pdf
    • http://files.davesbackyardbees.com/uploads/1/3/0/8/130814644/3065600.pdf
    • https://cdn.shopify.com/s/files/1/0438/3227/9190/files/pajobokurigujarofeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/weather_sawyer_mi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1348/0354/files/rafipejojelofojenulowo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3178/7670/files/types_of_adverse_drug_reactions_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/xotinus.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/gehl_5640_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1981/1490/files/top_500_companies_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0439/9199/0430/files/androcles_and_the_lion_story.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/can_you_refund_steam_gifts.pdf
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/esri_arcmap_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/nugagebetenofutu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/does_mipmapping_improve_performance_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5224/files/71752646143.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9588/files/34016299536.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_off00006518.bin
6b78840fd048cc0fb72733618389a61658ae6f7375324e0f5c061388e2f267ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6518 5664 bytes
font_01_sfnt_off00007828.bin
3851c64412cdd07c3bbff0004f2223380daf9515ab9ce946f298fa54c6f39254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7828 10212 bytes

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