Malicious PDF — malware analysis report

Static analysis result for SHA-256 684032d681a119e8…

MALICIOUS

PDF

44.0 KB Created: 2020-08-21 15:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38fc562946e72b0c7bc1dda48f2fead5 SHA-1: cebf450d27bf2326c5c2ff24d4a17865a856bc75 SHA-256: 684032d681a119e87324fff8c21f2184aac255d8352aee3a4f1f117f4e0ddd27
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content or phishing pages. The document body, though heavily obfuscated, contains references to the redirector and other benign-looking PDF links, suggesting a link farm or redirection tactic.

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/pify?keyword=markup+and+markdown+word+problems+with+answers
    • http://files.adulis.co.uk/uploads/1/3/1/4/131406390/fogife-paboj.pdf
    • http://japer.ravensfieldhockey.org/uploads/1/3/0/7/130739348/juroretiriwexe.pdf
    • http://wewukikug.shopumamiinteriors.com/uploads/1/3/1/0/131071021/1a29b6e8ab2b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/amiga_600_emulator_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/46900984295.pdf
    • https://cdn.shopify.com/s/files/1/0435/2199/9008/files/el_arbatel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/32959290186.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/77301231011.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/xawaxotezorotinar.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/30795486862.pdf
    • https://cdn.shopify.com/s/files/1/0428/4458/6140/files/lagoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/gokoboxizegan.pdf
    • https://cdn.shopify.com/s/files/1/0433/7473/9607/files/71652338130.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f9c.bin
feb5c99073e635cce803a0d6b4408e8a5bcf4c3f838830c3b4f01459d6c3aa72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9C 5384 bytes
font_01_sfnt_off000071c3.bin
b374c171c1f520b6c53e6beed22cabc366eeac96f195fc7bb04fa7a67d1bc2dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C3 10140 bytes
font_02_sfnt_off00009469.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9469 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.