Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76ef4c0d32774e4…

MALICIOUS

PDF

45.1 KB Created: 2020-08-10 09:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dd915bddce37971b8628b5de66524b4 SHA-1: e4591da16e1befe89d56f82a7aaf3c2944c33ea4 SHA-256: f76ef4c0d32774e446a1a383e8829fff095d98fdf76e1b9a97e261c67d9ebf0d
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though heavily obfuscated, contains the same malicious URL and a benign-looking title related to worksheets. This suggests a lure to trick users into visiting the malicious URL, likely for further exploitation or credential harvesting.

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=kinds+of+adverbs+worksheets+for+grade+5+pdf
    • http://files.jacquilewisarttherapy.com.au/uploads/1/3/1/4/131407233/811ebf41142bc.pdf
    • http://files.fromnicolawithlove.com/uploads/1/3/2/6/132681517/wuzem.pdf
    • http://zoweb.thomashodgesmusic.com/uploads/1/3/1/4/131482995/2908533.pdf
    • http://bujaka.gingerstache.com/uploads/1/3/1/4/131437601/ruzefututigabi_zatomevalagiro_pimajij_negolupewabewu.pdf
    • http://files.bendfarmersmarket.com/uploads/1/3/0/7/130776131/nekijusomuzikuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/gopisadiposiliveve.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/nonomivoxekizenasugunowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/zoranawevovupabesugik.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/bijatawadoxumevoxow.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/turogifamumarile.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/13240451721.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/37376506060.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/tau_empire_codex_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/20624741296.pdf
    • https://cdn.shopify.com/s/files/1/0451/0292/3939/files/akhand_jyoti_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
    • https://cdn.shopify.com/s/files/1/0430/8189/1989/files/raxumoluperato.pdf
    • https://cdn.shopify.com/s/files/1/0431/4175/9138/files/bozuwawifuradaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/24430658294.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/45803541508.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000705d.bin
825f7e01167e0a18b21b088eb291d1ee51a7e90de28745e0d44a03c7216d6276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705D 5720 bytes
font_01_sfnt_off000083ed.bin
d95f9d79c583703c65e6f230737fe04b41337d72e9b22c8e73ac826e1c4e0aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83ED 10300 bytes

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