Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a6b5cdd9b1ccc3…

MALICIOUS

PDF

44.7 KB Created: 2020-08-06 06:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee278b47bb6474b363e7aeea9f027721 SHA-1: 6eb116113fd176c044c5479af107c4360471f204 SHA-256: 64a6b5cdd9b1ccc3e410656a073cc323b6ef039fefa86db2d7aebb9b0055dd8d
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=figo+cervical+cancer+staging+2020+pdf, which is likely used to funnel victims to a phishing or malware distribution site. The document body contains obfuscated text and a reference to the redirector URL, suggesting an attempt to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=figo+cervical+cancer+staging+2020+pdf
    • http://pimaju.academicswithaplus.com/uploads/1/3/2/6/132681647/kudaxidetoxe_ritituxud.pdf
    • http://files.lashnessco.com/uploads/1/3/0/8/130873877/048fca.pdf
    • http://files.ecosecuresystems.com/uploads/1/3/1/4/131407096/wigakozixeko.pdf
    • http://files.zionlutheranclark.com/uploads/1/3/2/7/132740193/4348688.pdf
    • http://files.holysmokescountrybbqandcatering.com/uploads/1/3/1/3/131379253/2b2a00.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/bosch_ascenta_dishwasher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/727273611.pdf
    • https://cdn.shopify.com/s/files/1/0440/4648/3606/files/wepanoruxularibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/sizufogolup.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/40742980403.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5881/files/84764602131.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/xamarin_forms_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8332/4822/files/socket_error_codes.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/55306829202.pdf
    • https://cdn.shopify.com/s/files/1/0435/4385/5258/files/timofosiwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/attitude_test_questions_and_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_off00006e40.bin
ce636a1ceaa19ffd83b6ef8487b22eef925940bbc827b6df7f71a19557f239ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E40 5612 bytes
font_01_sfnt_off0000817a.bin
ed6a30119f1b31a3be3f4735de23d498e35e939c516835eed410a2e84c635eb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x817A 10616 bytes

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