Malicious PDF — malware analysis report

Static analysis result for SHA-256 869eaca25315202f…

MALICIOUS

PDF

43.5 KB Created: 2020-08-24 03:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 329fd1a9579172a5d8eba4922a0ce5cb SHA-1: 6672a5b63d4743bba3b1e17d67b5003489ae2643 SHA-256: 869eaca25315202f6b0d909a9defc61c21e0d30448825a5caa04a25aefaf9627
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, disguised as yearbook templates. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a malicious intent. The primary malicious URL identified is https://ttraff.cc/pify?keyword=free+yearbook+templates+microsoft+publisher, which likely leads to a further stage of the attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+yearbook+templates+microsoft+publisher
    • http://wukasizo.rockymountainraconteur.ca/uploads/1/3/0/7/130775350/pikonupazop-zanupelo.pdf
    • http://files.bdwponds.org/uploads/1/3/0/7/130775025/bb4b3048691df5b.pdf
    • http://minava.normanmuseum.org/uploads/1/3/2/7/132741099/3792983.pdf
    • http://files.koreabusinessgroup.com/uploads/1/3/2/3/132303388/8ca95e3c97e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/xesawagejesexodivajonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/93147999032.pdf
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/18503200466.pdf
    • https://cdn.shopify.com/s/files/1/0433/0317/4308/files/dar_es_salaam_stock_exchange_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/2634695662.pdf
    • https://cdn.shopify.com/s/files/1/0460/1983/8119/files/uniform_admission_rules_2015.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/75251832905.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/naleduzo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6472/files/carte_de_tous_les_pays_du_monde.pdf
    • https://cdn.shopify.com/s/files/1/0429/1523/3959/files/the_last_of_us_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.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_off000067c5.bin
240135b74a131819f66de82236e0b6c483eec8ba4bd1aec29f68b692022ba1fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C5 5516 bytes
font_01_sfnt_off00007a6f.bin
c554c3c7730c1f70328c1681eb93f42ea8b41a66454dad1379cfeab8d41877ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 12256 bytes

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