Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe5e6899a3fa08d…

MALICIOUS

PDF

57.9 KB Created: 2020-08-08 19:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7127cc2173dd2f0099d2c24691917010 SHA-1: c6419b3424833649464c3e42c11220354f34a68b SHA-256: 5fe5e6899a3fa08d061c769732cafb072aeabca566b97331d4fe4de19d5d89d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users. The primary redirector URL is https://ttraff.com/pify?keyword=microbiology+laboratory+tests+pdf, which is flagged as malicious. This indicates an attempt to lure users to malicious content through SEO-optimized links.

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=microbiology+laboratory+tests+pdf
    • http://files.ksdanceacademy.com/uploads/1/3/1/4/131437119/fitadazun-nokemepo.pdf
    • http://files.erasmusbyprimerasupport.com/uploads/1/3/0/7/130739081/62eb6b401d.pdf
    • http://files.lupulrealty.com/uploads/1/3/0/8/130814926/3329113.pdf
    • http://files.worldpairsangling.com/uploads/1/3/1/4/131453902/9d19ede6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/54812755864.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/61157746290.pdf
    • https://cdn.shopify.com/s/files/1/0435/0260/0356/files/lakupuzagivitofovipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6117/files/80136089463.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/kilomit.pdf
    • https://cdn.shopify.com/s/files/1/0434/9588/2918/files/laporan_pendahuluan_hernia_inguinal.pdf
    • https://cdn.shopify.com/s/files/1/0434/7373/1741/files/zuzexovek.pdf
    • https://cdn.shopify.com/s/files/1/0438/9113/0536/files/12868298665.pdf
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/13191626996.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/xeturozavawe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3346/files/after_effects_trial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.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_off0000a5ba.bin
b71aa59a2894b4e128cd5eed598fbf8b767bc54dbae8e1ca38f37956be4ff82a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BA 5568 bytes
font_01_sfnt_off0000b8c9.bin
19b6082e1f0bc45fc34489b67b79e78488015bbecf9d28db8dea9aa148f972b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C9 9852 bytes