Malicious PDF — malware analysis report

Static analysis result for SHA-256 948a3006c564388b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-05 05:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 296ccadc15ba2f685be1ba1617536c81 SHA-1: 09c866cc8e7a454255544b303b8e5cc1cc24120f SHA-256: 948a3006c564388b9ebebc580aa23a3aa1a26ac92233e42df95f4ac91ca9a3cf
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a URL containing a product keyword, likely a lure for users searching for that product. The ML classifier strongly indicates maliciousness, and the PDF structure includes numerous external links, many hosted on Shopify, which are likely part of a link farm to obscure the final malicious destination. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

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.cc/wb?keyword=manual%20dual%20lens%20vehicle%20blackbox%20dvr
    • http://pasago.karlariverasings.com/uploads/1/3/0/7/130776760/a1bed6328.pdf
    • http://files.teessidesteelers.com/uploads/1/3/1/4/131453843/70db2c95daf3d26.pdf
    • http://files.seizediem.com/uploads/1/3/1/4/131438741/vewim_gifesimefipotu.pdf
    • http://files.silaepic.com/uploads/1/3/0/8/130873984/wipizolakinugogoka.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/55283906298.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/haematology_all_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/drug_abuse_essay_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0438/9352/2587/files/zuzife.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5795/files/69964290171.pdf
    • https://cdn.shopify.com/s/files/1/0431/8612/7009/files/65453550683.pdf
    • https://cdn.shopify.com/s/files/1/0434/1114/4861/files/dasoridezipexemofepogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/wutomuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0988/files/divisible_by_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1103/files/libesepegive.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13002849425.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/tujesig.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_off000053d9.bin
9d6b4af49745f8166cbe0d5479b2f962890ab440af32b9536bceda86b4789dbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D9 9384 bytes
font_01_sfnt_off000072f0.bin
4239a021ec8bd0a7909fffaf495989363a16a43d283e678ca658bd1e537f5f46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F0 5364 bytes
font_02_sfnt_off0000853d.bin
20284757bb2593bed6f6ab9b0694428b210588007d71d9f322964ba525d08624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853D 11964 bytes

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