Malicious PDF — malware analysis report

Static analysis result for SHA-256 10282eae06b4ff79…

MALICIOUS

PDF

55.2 KB Created: 2020-08-08 13:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd573e7448df2ff151f0d48be97f079d SHA-1: f5e71b472bc9757bf65f5d2df635e07010a4acfb SHA-256: 10282eae06b4ff7989d8022dcb2d493b166b54b6c934635990c48f2e6c42b359
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to medical abbreviations. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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=list+of+common+medical+abbreviations+and+terminology+pdf
    • http://files.whittaylorcomics.com/uploads/1/3/2/7/132740595/kevotamefakulus.pdf
    • http://files.brisbanewritelinks.com/uploads/1/3/1/1/131164210/kanutato.pdf
    • http://files.ellentsa.org/uploads/1/3/0/7/130776735/sotupa_xumalo_lisat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9147/7148/files/78462169803.pdf
    • https://cdn.shopify.com/s/files/1/0439/1203/6520/files/75404449407.pdf
    • https://cdn.shopify.com/s/files/1/0450/2369/0916/files/arretez_moi_lisa_gardner.pdf
    • https://cdn.shopify.com/s/files/1/0434/8605/2518/files/noxevomesekonakisudileg.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/direvi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/zowabeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6092/8405/files/74999668045.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/wipod.pdf
    • https://cdn.shopify.com/s/files/1/0433/3908/8027/files/understanding_and_using_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0450/8942/3525/files/it2301_java_programming_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/famopijalagoxosogav.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/jinatizigamujowure.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/fibesasozanivit.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_off00008ce3.bin
b09d17470c26cb441bbcf1cf454cf902ec2e2e51e7af8b6b0ab01764d79c8d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE3 5716 bytes
font_01_sfnt_off0000a04e.bin
99db4a9ab72581825f3823a7f34621a54953a124d878ea3cb4fc472874507ea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA04E 15244 bytes

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