Malicious PDF — malware analysis report

Static analysis result for SHA-256 d702c53b91d27711…

MALICIOUS

PDF

42.5 KB Created: 2020-08-18 20:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa98921cc15914649a5b40decc9c212e SHA-1: 99242b54c3a509c3137d03ab2e3a04176e53df13 SHA-256: d702c53b91d27711bdad744e7bf1fb0658dac831db6a7d80fb9366b1d7e3072d
152 Risk Score

Malware Insights

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

The PDF contains a link farm with 28 external links, many hosted on Shopify, and one critical link to a known malicious redirector at ttraff.com. The document body, though corrupted, contains the URL for the malicious redirector and references to other PDF files, suggesting a phishing or scam lure. 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.com/pify?keyword=dietary+guidelines+for+meniere%2527+s+disease
    • http://files.shadestreetrodandcustom.com/uploads/1/3/0/7/130739978/28695.pdf
    • http://xaxiwata.emeraldowlproductions.com/uploads/1/3/0/8/130813834/861a0e30d5.pdf
    • http://files.reeftheband.com/uploads/1/3/0/8/130814132/3546987.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3137/files/95480719227.pdf
    • https://cdn.shopify.com/s/files/1/0430/3136/3747/files/60719627027.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatajimawi.pdf
    • https://cdn.shopify.com/s/files/1/0450/3745/3470/files/bengali_e_calendar_1426_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2856/8474/files/54539834207.pdf
    • https://cdn.shopify.com/s/files/1/0431/0843/4081/files/nowasuwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/guzupogenamuvax.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/gosezefiberowopatazepavu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/53602100535.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/dumatudowanilizudejetojeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7138/files/49236518831.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_off000067ec.bin
180de4572ac99b899812782183b1952ce5609c3da5b48bde97882c61cfb05dfa
pdf-font-stream PDF embedded font (sfnt) at offset 0x67EC 5364 bytes
font_01_sfnt_off00007a2a.bin
e818de06cfecc0def2e12ee7526b658dc40a3bee3e0a33711d92a497d3d9b60c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2A 10288 bytes