Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38aa983528f1266…

MALICIOUS

PDF

39.1 KB Created: 2020-07-30 14:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1776550fbc9dbbd55e567a63c87c31be SHA-1: 0aa836dd51c72e4a5c3bc4edf789d95fb71de0f9 SHA-256: c38aa983528f1266121f91a3f6abb970504018e2b388fec19352992206e6df92
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. This redirector is likely used to funnel users to further malicious content or phishing pages. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic to improve search engine visibility for malicious downloads.

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=hssc+undertaking+annexure+e1+pdf+download
    • http://files.americanamayhem.com/uploads/1/3/1/8/131856374/8697526.pdf
    • http://files.fxbrwanda.org/uploads/1/3/1/4/131407629/pubovijasexix-sefofaxapimubu-kajipowaz-mobabusoteguz.pdf
    • http://files.morganschools.net/uploads/1/3/1/4/131438449/rebalolulofiwiv_fowazu_liboraxotipifo_vabarol.pdf
    • http://files.purposeqi.com/uploads/1/3/0/7/130740342/kabaralizowa_lidatifimura_benoxos_gebinupesado.pdf
    • http://files.backdoortheatre.org/uploads/1/3/1/4/131454501/fonudusatikovitab.pdf
    • http://files.morganschools.net/uploads/1/3/
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/62245667891.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/28658475371.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/nufez.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/33705718091.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/80211894128.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/fuwabug.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/86863659607.pdf
    • https://cdn.shopify.com/s/files/1/0429/5298/2684/files/79820685424.pdf
    • https://cdn.shopify.com/s/files/1/0439/9477/5710/files/26094446408.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/dugepilusezezatugizab.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/23005935314.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/lokisexiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4693/files/67489115905.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b67.bin
4e1fa5237289bdd9ef504d51f3133dca0d8b3993f5e8013c386de9b6ee394658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B67 5444 bytes
font_01_sfnt_off00006e09.bin
91cbdb5427c3b2f545c749ac8abd201847af014fda5d69a295b28e398d165c83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 9708 bytes

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