Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa1e7a95280eac4…

MALICIOUS

PDF

45.0 KB Created: 2020-08-03 03:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42fd1a6e5f7cc378d006c6e87511ebcc SHA-1: 8d46b3ffd3cebeb78261e01154b74a12b16a3cf4 SHA-256: 0fa1e7a95280eac496828b41f54583c81ed300f558b48bb70e2aaf9b52b96560
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Catholic wedding program template' and the malicious URL, suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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=catholic+wedding+program+template
    • http://files.deanedancecenter.com/uploads/1/3/1/4/131406344/wekalizuni_xukad_fifabujowigi.pdf
    • http://files.katoutofbag.com/uploads/1/3/1/8/131857419/9e2adbe122d40.pdf
    • http://files.jason-molloy.com/uploads/1/3/1/6/131606569/dewafesoreniburixa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/don_t_let_s_start_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/74620737074.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/95838408783.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3333/files/nusazefunigulawosevib.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/21707356077.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/jiretolose.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/carrie_prejean_sextape.pdf
    • https://cdn.shopify.com/s/files/1/0431/1003/9719/files/770007748.pdf
    • https://cdn.shopify.com/s/files/1/0435/4329/8207/files/busch_stadium_soccer_seating_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/5337/4874/files/xuvipixovegirukirewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/94483288383.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2510/files/security_sy0-_501_darril_gibson.pdf
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/wijizo.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_off00006401.bin
39d25560145a343727fb2d15413844503f4499b369e1673c71936b44f88ea878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6401 5212 bytes
font_01_sfnt_off0000759d.bin
3b329d3cdf2514265541362760424579712182b05ce207df2ddde8b7b2efb196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759D 10176 bytes
font_02_sfnt_off00009881.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9881 4324 bytes

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