Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b8a976daf836c0…

MALICIOUS

PDF

41.5 KB Created: 2020-08-06 02:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6be9dc69f8077de22bf1a2693f45f21 SHA-1: c111fbec8795c2fe47ae1ec07c87c538e31d3ed9 SHA-256: b0b8a976daf836c03f2f73d15b53f08ac32ec2647b13671fb6e5a495203b7d98
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=statistical+inference+problems+and+solutions+pdf', suggesting a lure to external malicious content. The presence of a large number of links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially leverage benign-looking domains.

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=statistical+inference+problems+and+solutions+pdf
    • http://files.staytunedenergyhealing.com/uploads/1/3/0/7/130739214/6868867.pdf
    • http://files.theplaymakermanager.com/uploads/1/3/1/0/131069890/3940338.pdf
    • http://lodimal.lionscb.org/uploads/1/3/0/7/130738837/bifixupoxatumaleg.pdf
    • http://files.ctartlist.com/uploads/1/3/2/3/132303410/6094397.pdf
    • http://tijepub.leblancconsulting.net/uploads/1/3/1/6/131606490/fetidagef_wazize.pdf
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/antigone_oxford.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8277/files/23644998942.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/14456340688.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/41534561219.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8210/files/xaziporimiwenakuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/8292/3676/files/53749188735.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0938/files/voduvefur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/lupemoxefaxozorob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/33652450937.pdf
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/16933657589.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/44897106023.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/gerowegotogepidoxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/47319439677.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005583.bin
840605990ddca9b1e18861d41189cac9ae2b33ce52436189bd0d6aa14354acca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5583 5424 bytes
font_01_sfnt_off000067bf.bin
f9ffd1abcf58ad2e956a35cca5840b98b84d95ef41784643c608a8753f0f036e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BF 10260 bytes
font_02_sfnt_off00008ac8.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC8 4324 bytes

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