Malicious PDF — malware analysis report

Static analysis result for SHA-256 866f1c391d4d6657…

MALICIOUS

PDF

45.8 KB Created: 2020-08-08 16:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 445b0646a17b4424cd6eea4d66c527ee SHA-1: 25b4355289f28f3605472f47d66cccf2e1cfa478 SHA-256: 866f1c391d4d665726ada8c44b1cdbfbd11b18a0b6dce3e16a37474ab4a5941e
154 Risk Score

Malware Insights

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

The PDF contains a critical redirector link to ttraff.ru, which is known for malicious activity. It also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to benign Shopify domains but are likely used for SEO manipulation. The document body, though partially corrupted, contains the same malicious URL and appears to be a lure for a Bible download, suggesting a phishing or malware distribution attempt.

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=descargar+biblia+pdf+dios+habla+hoy
    • http://files.littlelemonmarketing.com/uploads/1/3/0/7/130738943/bejaxiwirepazuw_tewadewuvaj_xipomanaraz.pdf
    • http://files.uatim.org/uploads/1/3/1/6/131606486/7729453.pdf
    • http://files.tomsaundersart.com/uploads/1/3/1/0/131071067/1757720.pdf
    • http://files.digitalliteracycookbook.org/uploads/1/3/1/3/131381802/kikipumupo-wenexufuw-mitarigegat-xafas.pdf
    • http://files.haidagwaiimagazine.com/uploads/1/3/0/8/130874102/131b17751f04.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5609/4614/files/23461976612.pdf
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/78978481665.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/download_dirty_sprite_2_future.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3457/files/lelafaziranaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/saga_frontier_rom.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/xebopetunivapejogakiwaki.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/inter_national_khiladi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/learning_french_language.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/zisuvasoluterosidejima.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/97654809276.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/spanish_to_english_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/nalozokemufizaxosusum.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3607/files/maxigamopifoba.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cb8.bin
51929399fd466b2fc71d757829c6eabad41c2444cd25c31da7e82cb1a9a81d4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB8 5260 bytes
font_01_sfnt_off00006ea8.bin
0d4314ff88a5e168a5cbe52ae69f69832339df993e9354c89bd55e588718781f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA8 10900 bytes
font_02_sfnt_off00009215.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9215 4324 bytes
font_03_sfnt_off00009fc8.bin
f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC8 1736 bytes

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