Malicious PDF — malware analysis report

Static analysis result for SHA-256 76265ecf5f645105…

MALICIOUS

PDF

43.3 KB Created: 2020-08-09 23:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64399e9ad23e0ffc08656affc5617140 SHA-1: d4fd8a23cb046d133ec6e7bb1d2a6d2f7cbe8aa7 SHA-256: 76265ecf5f6451052e27e09caea44279608b1b696bb81a7d7f8e71843c265696
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or malicious content distribution attempt. The document body, though heavily obfuscated, contains the same keywords as the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external links, many pointing to Shopify, suggests an attempt to leverage SEO for malicious purposes.

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=ley+organica+de+la+administracion+publica+estatal+pdf
    • http://files.shawnberrymusic.com/uploads/1/3/0/7/130738924/vazunigamof-nojugabali-rujemulujewurab.pdf
    • http://teman.balancedguide.com/uploads/1/3/1/4/131407406/gaberoti.pdf
    • http://begax.woodlandharvestmountainfarm.org/uploads/1/3/1/1/131164243/87953ecec.pdf
    • http://files.ziontbc.com/uploads/1/3/0/9/130969037/sikobovo-tisazufufo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/77339362108.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/sisekegibapewi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/mastoiditis_aguda_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0435/5073/6533/files/ge_profile_dishwasher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9499/files/flush_by_carl_hiaasen.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/vesperia_secret_missions.pdf
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/62658432257.pdf
    • https://cdn.shopify.com/s/files/1/0432/8010/5630/files/76233768899.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/tawisokeletizuwaniwari.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/rujetamegajukasop.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/zovonitefopadu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2635/7160/files/84380038243.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_off00005c2e.bin
0096e32614cdabf2bd8d56822c61f6162cb0a0973fe96dc9f5278a9d1e0b1357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2E 5540 bytes
font_01_sfnt_off00006ef1.bin
e5e525812e175a0535cd0fecaadcd5fc417f8e88006139034710eac77d7fabf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF1 10092 bytes
font_02_sfnt_off00008ffc.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFC 4324 bytes

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