Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6ca7048fca5223…

MALICIOUS

PDF

50.9 KB Created: 2020-07-15 04:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daad82d455a3ed9691699aa44a94cc2f SHA-1: d55eaed8681d889ae9c251e363175376f4a8140c SHA-256: ab6ca7048fca5223d643073382218c1b1102c25bd993db0f98064002950d441a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be related to academic content, suggesting a lure. The primary malicious URL identified is ttraff.ru, which is likely used for further redirection or payload delivery.

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/wb?keyword=organic%20laboratory%20techniques%203rd%20edition%20pdf
    • http://files.avivahzornberg.com/uploads/1/3/1/8/131871637/musejevobemubul_gepibiju.pdf
    • http://files.literaturewithleonetti.com/uploads/1/3/0/7/130740625/wajavepipebubak.pdf
    • http://files.dayhikerchronicles.com/uploads/1/3/2/6/132681901/2976423.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4822/files/kawefixijiba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/medarovadujagowurevasote.pdf
    • https://cdn.shopify.com/s/files/1/0430/2723/4969/files/tibalebe.pdf
    • https://wilopag.files.wordpress.com/2020/07/debibokoled.pdf
    • https://denines.files.wordpress.com/2020/07/81751030916.pdf
    • https://ginajovepe.files.wordpress.com/2020/07/rinumomiribopex.pdf
    • https://titamajopemu.files.wordpress.com/2020/06/76130873652.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/18677678254.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/95215544204.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/95890970764.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/narujegas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/newazetukis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pezudatilekubad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/jixurisufexux.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_off00008207.bin
ad5ffcb4db42baf98b6b7a3ce13d5130684df85188e99be047b4d92e4e189fb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8207 5856 bytes
font_01_sfnt_off000095e0.bin
18bffa50fe1d48d9dc3c34ecb3605f7aaf28dccf2f591ac493bddfee8c296090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95E0 11080 bytes

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