Malicious PDF — malware analysis report

Static analysis result for SHA-256 864f9cfa960b3059…

MALICIOUS

PDF

43.1 KB Created: 2020-08-11 16:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98a747004d87e10bd204d17fb883a074 SHA-1: 447035a6f54f315fdd2ecc891395ce90cd202af4 SHA-256: 864f9cfa960b3059f215642504181f9b9b4c70187a977159b073368d2aff4990
154 Risk Score

Malware Insights

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

This PDF contains numerous links to external resources, with one prominent link identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Assumptions of law of demand pdf' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious site.

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=assumptions+of+law+of+demand+pdf
    • http://files.montoyaenglish.com/uploads/1/3/2/6/132681378/6450283.pdf
    • http://gerewewit.kristamaysart.com/uploads/1/3/0/8/130814328/wanigebivore-sobuginidapega-gakanomuketif-pixafofinekoxu.pdf
    • http://files.bishophillcolonystoreb.com/uploads/1/3/1/3/131378868/6973349.pdf
    • http://files.ionnibiru.com/uploads/1/3/1/4/131454523/dafapotegekigidovure.pdf
    • http://files.pagesofmypinkdiary.com/uploads/1/3/0/8/130814227/norozetok-serobufuwujig-pudura-fenoko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6787/5228/files/62710260869.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/41760067861.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/xtorrent_for_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/ncert_class_9_biology_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/blue_circle_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/42622582476.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/92180261881.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/gigogujimaviferuneruminu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6296/files/33177732053.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/sotitijotofo.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_off00006c4b.bin
d2a30a5996f005806e8df0f40b00ac048c833560f398161f9c8f20cffd584dae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4B 5172 bytes
font_01_sfnt_off00007de3.bin
e7c9e6694af85249b56248ebefe48a81f4b035b59a9ce1fe718375d6433cc135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE3 9904 bytes

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