Malicious PDF — malware analysis report

Static analysis result for SHA-256 0687b26833e5454b…

MALICIOUS

PDF

45.2 KB Created: 2020-08-03 14:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2de660bc20994e3ddd68c3fa0dcbf837 SHA-1: 33565da960c93101ea3dc0990e641ecaff4b8bc5 SHA-256: 0687b26833e5454bd3496d7cdb03636cbf53986f04af9ac040f7ddae20cc91db
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service or are part of a link farm. The primary malicious URL identified is a redirector that likely leads to further malicious content. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise its malicious intent. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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=death+of+archaeological+theory+pdf
    • http://files.augustahbcualumni.com/uploads/1/3/1/4/131453302/dokusemiri-ralikimixepez-tomobivalur.pdf
    • http://files.destinedforsuccessnow.com/uploads/1/3/1/3/131384306/bizuliwavozazema.pdf
    • http://files.matej-cerne.com/uploads/1/3/1/4/131483138/80515.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/senisixi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/30864103073.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/cookie_clicker_grimoire.pdf
    • https://cdn.shopify.com/s/files/1/0449/7873/3224/files/behavioral_finance_and_wealth_management.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/13108248944.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3387/files/kerawitalematevezemofaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/75268576001.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/78450445960.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/xoponamajimegoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/2262/8502/files/rurosunelepaderinamulano.pdf
    • https://cdn.shopify.com/s/files/1/0440/9671/6952/files/ladamikuwuvosunimixofobej.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_off0000657f.bin
3c2485240a9f2ad21828f4e495cb4472e2f2353c1c7abeeaa1aec49e5387c920		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 5020 bytes
font_01_sfnt_off000076bb.bin
3a58b26b26a2085679f588bbe48167205c296ba4b98853859c8e033b21276b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BB 10348 bytes
font_02_sfnt_off00009a04.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A04 4324 bytes

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