Malicious PDF — malware analysis report

Static analysis result for SHA-256 091bc075832f2195…

MALICIOUS

PDF

39.5 KB Created: 2020-08-23 08:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45ede42bac4d842af823084bcf369579 SHA-1: 3aefd8d35a78933bb30db2a7967a6283755ec9cb SHA-256: 091bc075832f2195382a3b72016e8b87110a381ce455b73e50622a47de5ae3a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a malicious link disguised as a login form, which is a common phishing tactic. It also hosts a large number of links to other PDFs, likely for SEO manipulation or to obscure the malicious intent. The primary malicious URL identified is https://ttraff.cc/pify?keyword=login+sscn.+bkn.+go.+id+2019+formasi, which is flagged as a redirector to malicious infrastructure.

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=login+sscn.+bkn.+go.+id+2019+formasi
    • http://files.larosamexrestaurant.com/uploads/1/3/1/4/131482968/tusugo-xonexapon-vusojibev-bovinilotug.pdf
    • http://files.cavalierbattalion.com/uploads/1/3/1/3/131379477/rusugijapufaju.pdf
    • http://files.faith-without-walls.com/uploads/1/3/0/7/130738554/gugedowedipizotevin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/geometric_patterns_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0429/2126/3271/files/45018221557.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/fujawupopojipojefen.pdf
    • https://cdn.shopify.com/s/files/1/0460/1610/2559/files/air_crash_investigation_season_19.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/zazeramivutanaveliwudoluf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/modujifusajowazor.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/todirevivazumozube.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/gynaecology_mcqs_with_answers.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_off00005b12.bin
5105e5d980e799798e5ea99e2cd6c25b5331ac0306725d4a446e2bac005354b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B12 5968 bytes
font_01_sfnt_off00006f58.bin
8100db52accb3e44306573fabef01f224d85abf5a797f286cc8494bcc860f65d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F58 9980 bytes