Malicious PDF — malware analysis report

Static analysis result for SHA-256 708b7c117f0bf2e6…

MALICIOUS

PDF

40.9 KB Created: 2020-08-06 06:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a59f47b91d1853b736c3a99213f597a SHA-1: aefc00e0d30fa8d705d11053ef346fbfd1acb52a SHA-256: 708b7c117f0bf2e60d646bf45cb6a5cae253c8d8ab915fdb81b776c5d54c0034
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though partially garbled, suggests a lure related to 'Auditoría de sistemas pdf'. The presence of many external PDF links indicates a link farm or redirection strategy to distribute malicious content. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

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.com/pify?keyword=auditor%25C3%25ADa+de+sistemas+pdf
    • http://files.leadrighttoday.com/uploads/1/3/1/4/131483148/cdff1187d87d1.pdf
    • http://files.morethanatourist.net/uploads/1/3/0/7/130738752/mesawepazurab_sebibaxav_luwogumatake_lazowalogonelun.pdf
    • http://files.ironfistboxing.org/uploads/1/3/0/7/130776245/rosevajegizufunik.pdf
    • http://files.carlosdepaula.co.uk/uploads/1/3/0/7/130740178/tibetemekap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/lipuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0859/files/folerulutisimudoris.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/47659690711.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/15494720211.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/32285843102.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/finonazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/49713799950.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/11610645804.pdf
    • https://cdn.shopify.com/s/files/1/0430/0898/3203/files/sixegafijorevobovudire.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/fowuwenitozoxulegezexef.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_off000060dd.bin
e237669a190fa12089b93b8873ed1e7fbce56e71ba9a4553d34fb2338b424bb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x60DD 5200 bytes
font_01_sfnt_off0000727d.bin
979b6da4b5e35fc8ab31e7e3ab11e8f241e0f6b96bc14683487005c670c93867
pdf-font-stream PDF embedded font (sfnt) at offset 0x727D 10604 bytes