Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f504dd37c79283…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 23:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 294415066beb5f88b6fb6f651406e724 SHA-1: 87351bf3b6b68bb760a47da970eda6c61197b49f SHA-256: 96f504dd37c7928306cd06f73ec8af6ffe14e39c37c4c33467e4b9656927a6df
154 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific malicious redirector URL, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains the text 'Abcd movie 2013 songs' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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/wix?keyword=abcd+movie+2013+songs
    • https://cdn.shopify.com/s/files/1/0448/5398/5442/files/neural_networks_and_deep_learning_pat_nakamoto.pdf
    • https://cdn.shopify.com/s/files/1/0437/6431/8359/files/chemistry_notes_for_class_11_file.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/mugevejorinikibatojipu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/biopsychology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6714/5366/files/91048475446.pdf
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/62140624759.pdf
    • https://cdn.shopify.com/s/files/1/0433/0933/4683/files/lugodosemabitiropowofiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7201/files/expensive_erika_jayne_video.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/dipuzom.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/40638305489.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9633/files/activate_windows_7_professional_crack.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/optician_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/jojutefowibatiwigasox.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/safe_acculturative_stress_scale.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/aranjuez_adagio_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/2258/1923/files/zapuxowipameritiradomete.pdf
    • https://cdn.shopify.com/s/files/1/0436/5585/6281/files/nowuxisanulak.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_off00006498.bin
1c2002a9f58bac743caf2d9fd10a6ddbedcb717c9671aec60c04d105ce6bbed9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6498 5600 bytes
font_01_sfnt_off000077a1.bin
f612b2783b4b1cf084820a491e8c416bfe55b6fca87d4e753f3f6889c4610d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A1 10292 bytes

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