Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08a6aaf02195bfb…

MALICIOUS

PDF

40.2 KB Created: 2020-08-08 16:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4cd0acbf36846150a1c9fb13f9b500d SHA-1: 57600a90960954243fca4867de1a5893827baf2f SHA-256: d08a6aaf02195bfbdf17fe4f5beff75da1b708cf2d4eb230bac248571acffe06
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bordered+paper+pdf', which is flagged as a malicious redirector. This suggests the PDF is designed to lure users to malicious sites, likely for further exploitation or credential harvesting.

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=bordered+paper+pdf
    • http://xulofafok.spokanetreesservices.com/uploads/1/3/0/7/130775219/cd3e9.pdf
    • http://files.bethanylutheranrlf.com/uploads/1/3/1/3/131381819/sizumomonogup.pdf
    • http://files.mycannablissonline.com/uploads/1/3/0/7/130776401/5115539.pdf
    • http://files.17359276.com/uploads/1/3/0/7/130738928/vigol.pdf
    • http://kinisi.ali-shaw.com/uploads/1/3/1/3/131398560/pisiwawuzinoneno.pdf
    • https://cdn.shopify.com/s/files/1/0432/7827/0619/files/fomazipogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/66129117876.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/27859429034.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/42693119062.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/tegupodafozoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5894/4405/files/fukadulovexir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/7618104953.pdf
    • https://cdn.shopify.com/s/files/1/0432/9265/5780/files/sesaxukapezepus.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/2526601564.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/fi

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000537c.bin
240418aa87abdefda38730d3562b299be55e2e65defe14e00c9281e1403eac59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x537C 4428 bytes
font_01_sfnt_off0000628d.bin
a714f0757dae4e893c875f317b8993e964b3409342ee053dd033a954fb4a3ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 10260 bytes
font_02_sfnt_off000085a9.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A9 4324 bytes

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