Malicious PDF — malware analysis report

Static analysis result for SHA-256 852abacf25475f58…

MALICIOUS

PDF

34.3 KB Created: 2020-08-07 22:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5090974c169ec03976d9507700248a19 SHA-1: 4fc0c877f0cbb4e1a282c30926ae3e87175d049a SHA-256: 852abacf25475f581b120fde697180f648a3f3d8cf5296301034ebb16a2a5ebd
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to downloading a "Portrait drawing book pdf" and the malicious redirector URL. This suggests the PDF is designed to act as a lure, redirecting users to potentially harmful content via the ttraff.ru domain.

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.ru/pify?keyword=portrait+drawing+book+pdf+free+download
    • http://files.roofingincentralarkansas.com/uploads/1/3/2/3/132302870/lobosologa-bumelafezuralew-vosodalevumum.pdf
    • http://files.hersheyblazetc.org/uploads/1/3/0/7/130738641/dinewosorajo-dudoxetaba-gadadadob-dewopik.pdf
    • http://files.tecsmithinc.com/uploads/1/3/1/4/131407802/8897386.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/20670413629.pdf
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/jezad.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/3126_cat_engine.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/zujulikuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/bestanden_samenvoegen_creator.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/d3_table_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/3102/6071/files/sezopolaror.pdf
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/48190744163.pdf
    • https://cdn.shopify.com/s/files/1/0431/1842/8326/files/door_knock_sound_effect.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/taman.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/70851064862.pdf
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/60680152366.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_off00004993.bin
0b76f0e30a6d73d0183f33b36df967fe8afd0462ab885aab168d72c69cb96d5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4993 5328 bytes
font_01_sfnt_off00005bd4.bin
65d8939b923e89068114aa1e91f6666ba0ba06c58d99aea3566feebbecebe83f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD4 9520 bytes

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