Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a8f4a3176d0b63…

MALICIOUS

PDF

41.2 KB Created: 2020-07-15 19:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 979df7b97e8161d3d53274f30942cf22 SHA-1: 2cd0fe71bf01d3520ad81d54db5b224cab2b65cc SHA-256: 17a8f4a3176d0b63f1ae5dfa6d0dda003df81f53189f83eff9795712ece1fd48
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm designed to manipulate search engine results. One of the embedded links directs to a known malicious redirector, indicating a high likelihood of phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to lead the user to malicious content.

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/wb?keyword=prince2%20handbook%20pdf
    • http://files.willsphotographypa.com/uploads/1/3/2/6/132682681/mawudi-tazewuja-duveditusifed-sugitefad.pdf
    • http://files.bowenheritage.org/uploads/1/3/0/7/130739308/1934782.pdf
    • http://files.pcbaseballacademy.com/uploads/1/3/1/3/131381614/7a04eb1f.pdf
    • http://files.makeupartistanastasia.com/uploads/1/3/0/7/130740090/3635046.pdf
    • http://files.hannabasinmuseum.com/uploads/1/3/2/8/132814387/6689639.pdf
    • http://files.nickcutroneo.com/uploads/1/3/1/4/131437926/wiwuv-kojaxe-sulubolob-makozibo.pdf
    • http://files.noboundariesdm.com/uploads/1/3/0/7/130739690/186c7474f54301a.pdf
    • http://files.mexicansoldados.com/uploads/1/3/0/9/130969386/5179412.pdf
    • http://files.laurenandresurbanist.com/uploads/1/3/1/6/131637773/641540.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://jevuboginov.files.wordpress.com/2020/07/kavimabetonukup.pdf
    • https://letevotiva.files.wordpress.com/2020/06/wuduluwux.pdf
    • https://wazakifi.files.wordpress.com/2020/07/61605403311.pdf
    • https://tofedete.files.wordpress.com/2020/07/99885719716.pdf
    • https://tolotaf347469470.files.wordpress.com/2020/07/lepubade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8917749958.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodupenewizaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/87254010498.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/bowarasajisewapot.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/giwefedak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/jawugafonemubasuvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4836/2399/files/tegobu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/mumuxiveguno.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/7484271788.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_off00006450.bin
2a763c936a1a00df842a4f4dd66f463366a3746155af8315df0b758f53f90f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6450 5076 bytes
font_01_sfnt_off00007569.bin
523b75fe0f6eb465dce53596daf744ec8f51af6e8ce1afe462af75c0b0822adf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7569 9968 bytes

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