Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bce97dfc097230e…

MALICIOUS

PDF

48.8 KB Created: 2020-08-29 04:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4169256c8f36d5941ed920eac26ee02e SHA-1: de92d73586adf1e30da47a8b6b25f9f36febecbc SHA-256: 5bce97dfc097230e82b4b65fcf264b9b0fe31d33d4b4f81f51fd4d9e7aa98965
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 external PDF files hosted on Shopify and other platforms. One of the primary links directs to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though partially corrupted, contains text related to educational materials, likely used as a lure.

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/wix?keyword=atlas+de+geografia+del+mundo+5+grado+paco+el+chato
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/4650/8456/files/aesthetics_problems_in_the_philosophy_of_criticism.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/59955154711.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/69117006830.pdf
    • https://static.usrfiles.com/ugd/b8c837_eadb04e4dd2a4112bd8e20bc403436be.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3d1e5b9c4dc424298829ba826c98630.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca986a1a6ce74d5094cbc76e0ad78578.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8353d9a4b014656bbdf633219a8d520.pdf
    • https://static.usrfiles.com/ugd/b8c837_59314993d6cc4bf49b3ec87b9c1fab23.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/jidifumukaxivojevid.pdf
    • https://cdn.shopify.com/s/files/1/0459/9126/4415/files/counterfoil_crossword_answer.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2201/files/70571797830.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/59133843561.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1409/files/dj_remix_kartonyono_medot_janji.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_off00006662.bin
2439a88932a4bf6500737748d36b56a25dc80ea7487152354e6e3fe7bf20d945
pdf-font-stream PDF embedded font (sfnt) at offset 0x6662 5564 bytes
font_01_sfnt_off0000791a.bin
ca6df0687e24b95064e4786aad1585c76be705fb3bd9e7aac7b9cc5fe4da71f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x791A 15504 bytes
font_02_sfnt_off0000a800.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA800 4324 bytes