Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a47931e174ee206…

MALICIOUS

PDF

44.0 KB Created: 2020-08-06 14:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 820057ce68ea70281ec2cafa213ae359 SHA-1: c1311cf169b800e222ce67952e4574f75b435c36 SHA-256: 7a47931e174ee206ef7d004d798c0cb7c635b399900dd6fdb9cd9d6de37fb597
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users. The primary redirector URL, https://ttraff.cc/pify?keyword=professional+architect+portfolio+pdf, is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure under the guise of professional documents.

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=professional+architect+portfolio+pdf
    • http://files.cjstuf.org/uploads/1/3/0/7/130775679/9910796.pdf
    • http://files.lighthouseofzachary.org/uploads/1/3/2/6/132681359/323aac36f17722c.pdf
    • http://nopawufum.cowboychurch.net/uploads/1/3/0/7/130739415/nuxeto.pdf
    • http://files.greenhopefinearts.org/uploads/1/3/0/8/130874257/1881066.pdf
    • http://fusobo.guitarbuilderonline.com/uploads/1/3/1/3/131398455/b25911b5d7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0999/0043/files/maniobra_de_cattell_braasch.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/islamic_banking_and_finance_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2581582401.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/22105727770.pdf
    • https://cdn.shopify.com/s/files/1/0428/3088/9126/files/75345765335.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/73223168919.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/jopig.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/human_anatomy_for_artists.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/mewumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0960/files/24514329597.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/19390526110.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/xopatorizir.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e5f.bin
f2eb5df1ffe232b16e986968a666d26d9927ce5fa82aa04ae267efb40207e4a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5F 5244 bytes
font_01_sfnt_off0000802f.bin
fbfc562b13d851ef0de8d5c0b82f0d5f81379ae2b809f620647b5245d9170e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x802F 10008 bytes

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