Malicious PDF — malware analysis report

Static analysis result for SHA-256 650640f9c226dd85…

MALICIOUS

PDF

47.0 KB Created: 2020-08-04 09:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7dc233e23ce5ce4d0c17033cf97b023 SHA-1: a4bdcd921e72b57e8803a915945ca13209e41dd9 SHA-256: 650640f9c226dd857e5e8571351bcb68fcf71eac35ea227b494acca9eacaba25
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body, though partially corrupted, includes the same URL, suggesting an attempt to lure users to a malicious site. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious content.

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=dc+cable+size+calculation+formula+pdf
    • http://files.boomerangsandrings.com/uploads/1/3/0/8/130873992/1343786.pdf
    • http://files.mechellestudio.com/uploads/1/3/1/4/131452735/pumapil-tebixufit-mizifu-rezagixum.pdf
    • http://files.kiuyanran.com/uploads/1/3/2/7/132740435/liris.pdf
    • http://files.rotarykimberleysouth.club/uploads/1/3/1/8/131857445/pafet-lonopudi-vexazi-gasurifizil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/96800983840.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/jerinelemebuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2109/1484/files/telazireke.pdf
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/jitakagupaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/69083064313.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/rizegonemofasabolulomada.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/wordpress_change_font.pdf
    • https://cdn.shopify.com/s/files/1/0437/9544/7970/files/34565147973.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/8185617791.pdf
    • https://cdn.shopify.com/s/files/1/0446/1946/4867/files/tcs_balance_sheet_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/ruxemu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2646/5436/files/93771279256.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/27991186227.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000789f.bin
68028a414c8b4f1d9bf7cac27c95b45ceace4f4956360e678619a15c16981ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789F 5488 bytes
font_01_sfnt_off00008b3c.bin
17f5e054c6c9a93a783e474d29cd9349e1283fc7a8a60f115857c662f8cff132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3C 10472 bytes

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