Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4b665393fe061b…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 16:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8b39ea7d61ce1c7e0405509381abfbc SHA-1: c9bb801bdeced4b45284e122fc0048bb5228e206 SHA-256: 6d4b665393fe061b99a11c9f75acc70db38500d25228c0af442e7b526a22dcf1
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though malformed, includes text related to 'handbook of virtue ethics in business and management pdf' and the malicious URL, indicating a lure to disguise the malicious intent. The presence of many external links, some benign and some malicious, points towards a link farm used to obscure the true destination.

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=handbook+of+virtue+ethics+in+business+and+management+pdf
    • http://files.dessertdesignsbygisela.com/uploads/1/3/0/8/130814254/1057351.pdf
    • http://files.mytechoasis.com/uploads/1/3/0/7/130739072/2d7875.pdf
    • http://files.heart2heartfs.org/uploads/1/3/1/3/131379183/zinovozopuso.pdf
    • http://files.monmatgrp.com/uploads/1/3/0/8/130814234/9160538.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/vefiletipelolonufag.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/intermediate_english_reading_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/vekijolixinazulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/convert_wav_to_flac.pdf
    • https://cdn.shopify.com/s/files/1/0435/5558/6203/files/61916309987.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/present_value_annuity_factor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0428/5880/7455/files/68539470472.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/jazalapepefix.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8920/files/xubutajupobetisisifukovep.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/dagofajekisu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2353/8088/files/42985097650.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.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_off0000699f.bin
09443443418fd01887eab4d7e4599494c7cc3a54c09cdb8debf94081f047a166		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699F 5760 bytes
font_01_sfnt_off00007d19.bin
bcab4c0f8e7ce29a327ae9438fa0a866d0581b2b7d449bd0209f72e82d2ca473		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D19 13264 bytes

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