Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f2f5beb366c888…

MALICIOUS

PDF

49.5 KB Created: 2020-08-05 16:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e4298af8e684f2af00bff985880f2ed SHA-1: 1073a856429d28819f75fa423e315be4bd2a68e6 SHA-256: 03f2f5beb366c88835a2b8ab3cdf76a74f9d53cab993ea69a45b0633d4d44226
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=advances+in+meteorology+climatology+and+atmospheric+physics+pdf', indicating a malicious intent to redirect users to harmful content. The document body itself is heavily obfuscated and contains a reference to the same malicious URL, further supporting the malicious nature of the file.

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=advances+in+meteorology+climatology+and+atmospheric+physics+pdf
    • http://files.campcenterstage.org/uploads/1/3/1/0/131070109/5943628.pdf
    • http://files.lukeandrowan.com/uploads/1/3/1/3/131378975/wajobopawilekukin.pdf
    • http://files.colourpurpletherapies.com/uploads/1/3/2/7/132712306/wirebofu-mamowi-fumexewov.pdf
    • http://files.iscariotstories.com/uploads/1/3/0/7/130738620/7f48eee3c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/65369363652.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/wudimojewejusunugatevola.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/39030484844.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3526/files/tilodunanojugusidipaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sivuduveserekolagaxabulux.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/71103094803.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/jee_b_arch_sample_paper.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/40670963791.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/17284943493.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/13842356730.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/88801502274.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_off0000740b.bin
980ad649a747f1c6d53b16cc89c6b0cd7fcad6d2fb754e1aebbd9e0069668a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740B 5508 bytes
font_01_sfnt_off0000869e.bin
5e2af2878093757bebe73350abe352c0cb9a465b94c55328b5f0e618d03e6329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869E 10532 bytes
font_02_sfnt_off0000aa72.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA72 4324 bytes

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