Malicious PDF — malware analysis report

Static analysis result for SHA-256 116f22417cc1bb61…

MALICIOUS

PDF

54.6 KB Created: 2020-08-29 17:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aae989b40761712c2a530005012176d SHA-1: 248cbba1f01bd973a96835e785487d4b9adad2ac SHA-256: 116f22417cc1bb618e81e5faea115c37cf482780f3dfc8b8481043323550b33f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One prominent link, 'https://ttraff.ru/wix?keyword=speak+now+3+pdf+free+download', is flagged as a known malicious redirector. This indicates an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

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=speak+now+3+pdf+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/3615/4773/files/14811582617.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/miwijaragimuwefomejokem.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/pekadugorikusirojivov.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/77661271416.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/purubidejurupefedu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7733/files/36871053201.pdf
    • https://cdn.shopify.com/s/files/1/0432/0021/7249/files/prelude_bach_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/big_ideas_math_geometry_common_core_student_edition_2020.pdf
    • https://cdn.shopify.com/s/files/1/0450/4082/8566/files/zujuwuveroxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/brighthouse_channel_lineup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5751/files/xukasose.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2675/files/canon_mg2900_manual.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_off00007f8f.bin
93f8dd34f7e8ce43c0bec05a807ff4b67de943de5b655d53deb3649f2ccfcd42
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8F 4940 bytes
font_01_sfnt_off00009074.bin
fade2fe71b2d13142c7c462d449b1dcd2458d6c0479277e9f678fde6ea75821b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9074 15168 bytes
font_02_sfnt_off0000bfe3.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE3 4324 bytes