Malicious PDF — malware analysis report

Static analysis result for SHA-256 851acdbaa177cad7…

MALICIOUS

PDF

40.3 KB Created: 2020-08-18 16:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 522fc40f527c0be5fa1c6f9e52634f59 SHA-1: 36f1514d610ab3b5cffc0c62207f521abcf2f4b5 SHA-256: 851acdbaa177cad7ed9c1c3973ceb97f8aca32c4a05851877dc22a87e39093d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/pify?keyword=posthuman+ecologies+pdf. It also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDF files, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The primary attack pattern involves tricking users into clicking a link that leads to harmful content.

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=posthuman+ecologies+pdf
    • http://toruse.lucylusknoxville.com/uploads/1/3/1/4/131453329/pisekukadu.pdf
    • http://xemujeze.warkianilab.com/uploads/1/3/2/6/132681396/81224d3066fe.pdf
    • http://files.mrslambsroom.com/uploads/1/3/1/8/131856372/c79db184042.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/kalphite_task_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/nujevewuvip.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/kugawatevuruzom.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/63450290948.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/33996429639.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/mafia_3_wiki_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/velazekav.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/free_gold_glitter_background.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/39011574368.pdf
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/30991557489.pdf
    • https://cdn.shopify.com/s/files/1/0452/0319/4007/files/tokebaluketav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/96050068042.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7722/files/58229060950.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_off00005f84.bin
7529d62ed35f421f597b4be1defeffffc105e5a89a66ab927e1cb4903f678658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F84 5476 bytes
font_01_sfnt_off00007208.bin
d86be716f59ccd39ad720f0b068317bb8666b82f45ffbe0416f97f47abe6a2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7208 10128 bytes

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