Malicious PDF — malware analysis report

Static analysis result for SHA-256 608db67f50781a92…

MALICIOUS

PDF

48.5 KB Created: 2020-08-10 09:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c75d4fd538325de5e3086fa6b3b21baa SHA-1: 58b28556aa3abddf979dfadb8d70b3ae3ec2f0e9 SHA-256: 608db67f50781a9201d205ffe8d39f442d9bc00730dce2213f931c330be6c2f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body itself is heavily obfuscated but contains a reference to the same redirector URL. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to click on these links, which likely leads to further malicious content or phishing pages.

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.com/pify?keyword=english+vocabulary+about+food+pdf
    • http://files.patricklyons.com/uploads/1/3/0/7/130775665/kipoxeped.pdf
    • http://duvunoxum.jetvideoonline.com/uploads/1/3/0/8/130814328/mimabitigugokes_jefomexos.pdf
    • http://files.savetheshackguilford.com/uploads/1/3/2/6/132683017/1853547.pdf
    • http://fadel.mistertea.ca/uploads/1/3/0/8/130813528/1058370.pdf
    • http://ketefuj.fifthelementdefense.com/uploads/1/3/1/6/131636725/9ddf5a7906aacc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/33565975919.pdf
    • https://cdn.shopify.com/s/files/1/0437/2869/9553/files/grey_knights_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8537/3333/files/mahesh_bhatt_biography.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1464/files/muvenum.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/32912273062.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/25377067980.pdf
    • https://cdn.shopify.com/s/files/1/0437/8253/7365/files/save_r_script_as.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/lawutozu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0985/files/majatezubalogif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/85636265660.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/60690888687.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/badefalumevabedijabunijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/zopebaxafi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.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_off000071a5.bin
5013bba568fd050be353299bba9ac4dd702ebd0d340f8cb6b84be6fcc9d59eb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A5 5440 bytes
font_01_sfnt_off00008415.bin
7c2740baa89c3621df35e8c7d719dfcb59851c6654bf1f5bc1e35eaf3f86b848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8415 10036 bytes
font_02_sfnt_off0000a674.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA674 4324 bytes

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