Malicious PDF — malware analysis report

Static analysis result for SHA-256 dceb9709fa5ed92f…

MALICIOUS

PDF

41.6 KB Created: 2020-08-21 22:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b010181bed9f15f6f093596cb06f3ad SHA-1: 67faaa3b0284513d7b90061040a653a2286db41e SHA-256: dceb9709fa5ed92f497bf52db105442e3f7b00e987b9b7ba85957a85cc59fd17
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=battery+not+charging+100+android, which is likely used to obscure the final destination of the attack. The document body contains garbled text but also includes the same malicious URL, reinforcing its role in a phishing or redirection scheme.

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.com/pify?keyword=battery+not+charging+100+android
    • http://files.inessapsychotherapy.com/uploads/1/3/1/4/131452771/1b71955.pdf
    • http://galudaro.thameswardcommunityassociation.com/uploads/1/3/1/3/131398244/221586.pdf
    • https://cdn.shopify.com/s/files/1/0429/6985/8214/files/ielts_writing_band_9.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/nami_waiver_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/46141058003.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/urad_dal_cultivation_in_tamilnadu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1033/4620/files/pobedabojabinelu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2583/files/2419403789.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/donibo.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/sabertooth_990fx_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/tisiledezibumujidu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/59261761948.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_off000063b0.bin
627b961474dcc49977f8588ebcd78588e2bb9320641ce299d3e5e56096b5ac77
pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 5336 bytes
font_01_sfnt_off000075d4.bin
9d8923574048ab27d4c5ab92feae839a86eacd1ea617b11cb1969da97b6e8980
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D4 10636 bytes