Malicious PDF — malware analysis report

Static analysis result for SHA-256 734497d06a9f670d…

MALICIOUS

PDF

50.4 KB Created: 2020-08-16 16:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe16fdc65aed262fd8b92a17a5d1f843 SHA-1: 30a8a05a5926a67af365bb18eea67455480bcd35 SHA-256: 734497d06a9f670d2847fc4158ba4c6aa4fab49890681378879fd8823f2a16bf
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is `https://ttraff.cc/pify?keyword=buddhist+books+in+sinhala+pdf`, which is flagged as a malicious redirector. The document body and embedded links suggest a lure to trick users into visiting these sites, likely for phishing or malware distribution.

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=buddhist+books+in+sinhala+pdf
    • http://mebiza.lakebraddockfootball.com/uploads/1/3/2/6/132695492/c5194ee870cf519.pdf
    • http://wotes.openheartstudio.org/uploads/1/3/0/7/130739590/0896b7b0e0cb.pdf
    • http://files.amandasmusiclessons.com/uploads/1/3/1/6/131606133/mitaful_juzaxizivirale_zoluvirafuto_jevijikojif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/wow_sinestra_solo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5352/files/62670389339.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/42694377856.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/18905079749.pdf
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/antagonistas_da_vitamina_k.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/xetudabenopuxunupuvap.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/96183600920.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/juzidopusiridukepaniza.pdf
    • https://cdn.shopify.com/s/files/1/0432/0496/8603/files/vuzuwowewawarozejoxilo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9273/files/aditya_hrudayam_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/96933078580.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/sociologija_knjiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/fimikotazotexitavifa.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
    • http://sinhala.sourceforge.net/
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITS
    • http://www.gnu.org/licenses/gpl-2.0.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb1.bin
51f4dfb1704b3ba95e876b02108f0de6dda0c6304baf51ba63838ed29777ba2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB1 5048 bytes
font_01_sfnt_off00007c7d.bin
cca5298ad2e89ab0d41cc63a8205340d9321530172a8d5dda1c28d17fa56adaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7D 3840 bytes
font_02_sfnt_off00008a8c.bin
163d6f0cbce88d00fdade5816db57746dc2797db836dfedb300202ed91e8f282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8C 9876 bytes
font_03_sfnt_off0000ac5b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC5B 4324 bytes

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