Malicious PDF — malware analysis report

Static analysis result for SHA-256 2496e491b6486080…

MALICIOUS

PDF

47.4 KB Created: 2020-08-17 15:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6b5d949c4fe72e5dcbff6127d096f0c SHA-1: 4c430b00c19bf6baa563e52c5e779177e840794c SHA-256: 2496e491b6486080eb95cdf5129c61ffac49cf5c1021a834c83d02dac1accf40
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=google+sheet+template'. This URL is presented within the document body, disguised as a Google Sheet template, to entice users to click. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=google+sheet+template
    • http://files.daytonsockcompany.com/uploads/1/3/0/9/130969817/polakexibuwavijefev.pdf
    • http://files.zumbawithmelody.com/uploads/1/3/1/6/131606546/6701429.pdf
    • http://files.flyinktattooparlor.com/uploads/1/3/1/3/131379999/jilokonedun_gunim_gusuvevavuk.pdf
    • http://files.jhopep.org/uploads/1/3/1/4/131407144/danezu.pdf
    • http://files.wilkinsonbrian.com/uploads/1/3/1/6/131606874/nupudupomelugajawad.pdf
    • https://cdn.shopify.com/s/files/1/0433/3663/0422/files/wastewater_engineering_treatment_and_resource_recovery.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/rugozajajiwolaberu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/wekibilus.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/81474091866.pdf
    • https://cdn.shopify.com/s/files/1/0449/2325/6999/files/wopodewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/29264166342.pdf
    • https://cdn.shopify.com/s/files/1/0432/6001/8852/files/46574585907.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/guxivid.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_off00006e6a.bin
79287b7e8624b4db594aa6612a9222f9f1e4c969ed6ac3d62974ef40535ce09e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6A 4800 bytes
font_01_sfnt_off00007ec9.bin
2c48219faed2713769567dc01fa5974327e79b2af878ab77ffc7f77ad8768a60
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC9 10432 bytes
font_02_sfnt_off0000a272.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA272 4324 bytes