Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca818ee963fe19cd…

MALICIOUS

PDF

39.6 KB Created: 2020-08-23 22:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc9f3474ab2fff1ef165e03bea921e3f SHA-1: b21020b3a54820240ecdd0c320b6727581b44ea2 SHA-256: ca818ee963fe19cd1e9e4d75e4e9f6c472d8e1b9b6a6dc8440e674345930913c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a specific redirector URL, indicating a phishing or malicious content delivery attempt. The document body, though partially corrupted, contains the text "Wuthering heights questions and answers pdf" and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=wuthering+heights+questions+and+answers+pdf
    • http://files.beratungen-therapien.ch/uploads/1/3/0/8/130813692/4fb314dda6b54.pdf
    • http://dolote.brockenhurst-station-taxis.com/uploads/1/3/1/8/131857120/lavabuguxut.pdf
    • http://satagug.ashleyscleaningservice.org/uploads/1/3/1/3/131379394/35ae3384.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/97119530667.pdf
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/37218675029.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8519/files/quran_surah_ar_rahman.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/dosavosoxogenuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/gatojimu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/audit_number_on_texas_dl.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6334/files/52969526570.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0576/files/charkha_gama_da_song.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_off000059b9.bin
f12875a2a62d06efaf28b747abf906bad1eb78795d40c3bf69db8e781a1e7fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B9 5504 bytes
font_01_sfnt_off00006c80.bin
bf260f90a706e9e1feba94f9e963a9a55701c43d687fd97c32ea3b6d1b3ba91c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C80 10872 bytes

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