Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b719ca51b58313…

MALICIOUS

PDF

39.6 KB Created: 2020-08-08 03:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9df4580679ffbd4bfb2b02b1a0edfdc0 SHA-1: db3a8d8c652c19dd91b14224c3778c5c5078e633 SHA-256: 12b719ca51b58313d722948c50ce60ad0bf21ab0865273f3841ca3e5cf2612b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body and embedded links suggest a lure to download further content, likely malicious, under the guise of academic or legal materials. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links.

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.ru/pify?keyword=bittencourt+penal+volume+2+pdf
    • http://wedodu.nicolewebster.ca/uploads/1/3/2/6/132681352/3877823.pdf
    • http://dolipulu.purposefulgrowthcoach.com/uploads/1/3/2/7/132712615/31d4455ea8d8b0.pdf
    • http://files.galgoamigo.com/uploads/1/3/2/7/132740836/e6a9ab3a9f.pdf
    • http://files.artronshop.com/uploads/1/3/2/7/132740260/futapiv-zajufedodufo-kisurozoluxi.pdf
    • http://files.intheloopradio.net/uploads/1/3/2/7/132741052/2586231.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/7859321899.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/57067497970.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/2763117048.pdf
    • https://cdn.shopify.com/s/files/1/0448/1007/6321/files/arithmetic_by_rakesh_yadav_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/8013/7369/files/labovadisiwotifadotir.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/behavioral_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4823/files/2256296550.pdf
    • https://cdn.shopify.com/s/files/1/0437/3839/8869/files/diablo_2_blizzard_sorc_build.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/8364188588.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/java_programming_book_bangla_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/ayushman_bharat_hospital_list_punjab.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5235/files/xijabawipisosunomonetowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/cok_auto_typer.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_off00004efb.bin
ecf4af912a0e49473015e20cb739ba730c04a2fc79c4a6dbbc0e06b0305b0bc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EFB 5244 bytes
font_01_sfnt_off000060b7.bin
5fb1833b430a5e6d20589251d9afdee3dc9c8308b7968b11b38a4eabb5532b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 10040 bytes
font_02_sfnt_off00008317.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8317 4324 bytes

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