Malicious PDF — malware analysis report

Static analysis result for SHA-256 392756e013393d3b…

MALICIOUS

PDF

37.4 KB Created: 2020-08-01 14:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b402eef7aad5cbd43361b80316cda73 SHA-1: ee11a765b40767350ca9bb558a27545b6447bc7a SHA-256: 392756e013393d3b19bacf86017c389143bf2ba69230a1fe30e56fbf552237bc
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL pointing to 'https://ttraff.ru/pify?keyword=scott+foresman+science+grade+3+workbook+pdf'. This indicates a social engineering attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=scott+foresman+science+grade+3+workbook+pdf
    • http://files.mcguiresvapory.com/uploads/1/3/0/7/130739906/wakoretegisekaf.pdf
    • http://files.poverty-conference.org/uploads/1/3/2/7/132740498/kubutinix.pdf
    • http://files.loudoununited.org/uploads/1/3/2/7/132712451/kuladaboke_nikobinifexiw.pdf
    • http://files.capitalcountrycavyclub.org/uploads/1/3/0/9/130969546/ad238ddb9f2b.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/88363733782.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6760/files/zogirewezosibisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/podopotefodenale.pdf
    • https://cdn.shopify.com/s/files/1/0428/5884/0223/files/lijaxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8938/7939/files/javixoxetonevilivakibozi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/mipuxa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/r._a._c._e._writing_strategy_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/jokapuketepudamedas.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/94029050098.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6346/files/pezodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2644/files/7943516246.pdf
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/josupexejofotugegasufu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004617.bin
d711d0e1d3a8f804eac48ec6bf08a94fb4b444b2f580c6a366720d97e5edf1ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x4617 5792 bytes
font_01_sfnt_off000059ba.bin
3e3a1e1efc1168d89f648898f2618195ac5435bbcedf6326e7b991a86ccf4693
pdf-font-stream PDF embedded font (sfnt) at offset 0x59BA 9608 bytes
font_02_sfnt_off00007a7a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7A 4324 bytes