Malicious PDF — malware analysis report

Static analysis result for SHA-256 68895110471fc0b2…

MALICIOUS

PDF

44.0 KB Created: 2020-08-19 03:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d6ff3a40f3d7005f51d418c70f408d3 SHA-1: 10bd018508f7fda6bb76bbbb4dda786a35ff4b71 SHA-256: 68895110471fc0b2ab904aace29edd661309f15f7645aa62882b8cd409bd8c2f
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link disguised as a programming PDF, aiming to lure users to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests an attempt to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection.

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=arduino+c+programming+language+pdf
    • http://files.gbyws.org/uploads/1/3/1/4/131483019/paludizixi-pazibokadelok-xovubonavegazuz-nobuxudisapefod.pdf
    • http://files.southscript.org/uploads/1/3/2/6/132682892/3240687.pdf
    • http://files.breakthroughtc.com/uploads/1/3/1/4/131412235/nafopesekelov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/90725239243.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/junotonujaruj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/multivariate_data_analysis_6th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/biomedical_waste_management_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3651/files/soxatoxaxuxogo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9238/files/loxexolerelusafiru.pdf
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/74494157633.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/tagewigowuxixexalugegen.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/harbor_freight_drill_bit_sharpener.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/duzotes.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/butezowodavojuzipi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/manual_j_8th_edition.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_off0000603d.bin
5ab08e097b08f00b4e5892e6bd17c265f643dbd7cbac5070a35cbee2c56e2352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603D 5088 bytes
font_01_sfnt_off00007166.bin
56ea88de497c469c3af00e9e57e5c109e5adb2d548f385633835e33b7a3dfd5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7166 10460 bytes
font_02_sfnt_off000094fe.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FE 4324 bytes

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