Malicious PDF — malware analysis report

Static analysis result for SHA-256 10004b6717cf568b…

MALICIOUS

PDF

48.1 KB Created: 2020-08-09 20:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd1c9cda5ae382fe3480ec9bdbc9ed58 SHA-1: 93f64a55d13b564d60c251560ee331f85e72afe3 SHA-256: 10004b6717cf568bca494fb1107c73aff094cdc9b1388486c63414515dc88e4e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=american+beauty+sheet+music+pdf'. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's part of a link farm designed to distribute malicious content. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely as part of a phishing or scam campaign.

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=american+beauty+sheet+music+pdf
    • http://files.leetech-led.com/uploads/1/3/2/3/132302951/seredig.pdf
    • http://files.raniyoungdesign.com/uploads/1/3/1/4/131406337/3e979ccddb.pdf
    • http://files.thisandthatspiritchat.com/uploads/1/3/1/6/131606343/kemumum.pdf
    • http://files.magnuspolson.co.uk/uploads/1/3/1/4/131438093/7f3ee8db31.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/8191/4781/files/44065456908.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3335/3627/files/43477775216.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/conjugaison_du_verbe_avoir_et_etre.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/kefomajanabobakalejir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/understanding_computers_today_and_tomorrow_chapter_5.pdf
    • https://cdn.shopify.com/s/files/1/0436/1689/5133/files/ronatubujevutexeto.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/11121709963.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/31032735791.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/fiwekobovoxulaxololijoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/resuzawifurelalew.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9066/files/add_add_in_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/baal_shem_suite.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_off00006f24.bin
afc5f71274ed863ddf73eabeabb92a56433aff2ab2ac4c70f29a0f17a02f7e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F24 5364 bytes
font_01_sfnt_off00008124.bin
b60238b19ac0ed668f825e665009c79c1c5dc105e29b5b26ae8bad0c1caa7535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8124 10516 bytes
font_02_sfnt_off0000a527.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA527 4324 bytes

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