Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9e078695786a7d…

MALICIOUS

PDF

38.5 KB Created: 2020-08-01 17:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b03784add30c4e0a9aa24cf3fde8684e SHA-1: 462ea9cfd8cc8d74e0013db45447e72d7b513c08 SHA-256: 4b9e078695786a7dcbb3b1fcc5c197eba9c0b258ec5582bf1f2c7dae9f8621ee
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=e9%2525+81%2525+87%2525+e8%2525+a6%2525+8b, which likely leads to further malicious content. The document body contains garbled text and embedded URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=e9%2525+81%2525+87%2525+e8%2525+a6%2525+8b
    • http://files.northeastturtles.org/uploads/1/3/1/3/131379671/68eada.pdf
    • http://files.koreanatoledo.com/uploads/1/3/1/4/131437254/1154091.pdf
    • http://files.heaterpcbrepair.com/uploads/1/3/0/8/130815014/d0140e167f2ca6.pdf
    • http://files.drrobdds.com/uploads/1/3/0/7/130738803/safigagap.pdf
    • http://files.shaksygroup.com/uploads/1/3/2/8/132814967/3610299.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/93163573123.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/majudosedatagutarexul.pdf
    • https://cdn.shopify.com/s/files/1/0431/7406/8390/files/jexolojat.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/68923979955.pdf
    • https://cdn.shopify.com/s/files/1/0437/1415/0565/files/jomebebasagelotodek.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/minecraft_dimension_ids.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/batadur.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/22696591629.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5750/files/jolaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/luruvotubaraxerovo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/kuwetejovijinopesulabamij.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/zofanujisajuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.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_off00004fea.bin
d8ef148c594adba1946aa7d95f188f3f33f69c77bc22762a1a4a57bcfd89a796
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEA 2960 bytes
font_01_sfnt_off00005a6c.bin
fb8d492a23bd6c1d329ca3c1a6b2433376cf3869b86f533485e7c1f6a26f726a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6C 5340 bytes
font_02_sfnt_off00006c99.bin
ec9a6526b0506606ccbe2ff33d043e17661c5a447de434abd6a4daf55e82baf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C99 9432 bytes