Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6f8a7954ae36c1…

MALICIOUS

PDF

58.9 KB Created: 2020-08-19 23:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed24b9fb69fef020e5cf4deeedaefa0d SHA-1: d7f2b3d4b201bc8302354d4978e6cc3dea78080d SHA-256: 2b6f8a7954ae36c121f152b527b955a829968d31ce2ff6047ee46f3e3b28b4fa
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=blue+bloods+episode+guide+season+10. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to external content. No scripts were extracted, limiting the analysis of further payload execution.

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/pify?keyword=blue+bloods+episode+guide+season+10
    • http://files.evolvedesigntt.com/uploads/1/3/0/9/130969663/segamesejaputetib.pdf
    • http://fusise.studentsagainstnicotine.org/uploads/1/3/1/4/131453574/jomoroveteroz.pdf
    • http://files.amerishop.biz/uploads/1/3/2/6/132681062/7434712.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/rip_music_from_youtube.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5508/files/vimalevelizerimax.pdf
    • https://cdn.shopify.com/s/files/1/0437/1084/0981/files/atlas_of_amputations_and_limb_deficiencies_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/simple_present_tense_sentences_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/kejimapiruxozet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/wimagowolaro.pdf
    • https://cdn.shopify.com/s/files/1/0437/4783/6065/files/kumara_satakam_in_telugu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/highlight_ipad_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/74597997917.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/52063234268.pdf
    • https://cdn.shopify.com/s/files/1/0434/7029/1096/files/warehouse_management_handbook.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_off0000a81b.bin
c1b3a0f41bf3eab0889abd0e1d9e0d3aad71be6841cda6c744e3ad5a2132b68e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA81B 5412 bytes
font_01_sfnt_off0000ba97.bin
bfec3e1c81c54afe3c096288c25baf470830a48bd07cc4ef6be575e22215f44f
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA97 10784 bytes