Malicious PDF — malware analysis report

Static analysis result for SHA-256 271a1c717e140a42…

MALICIOUS

PDF

48.3 KB Created: 2020-08-10 23:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0482b3a9a9443884228a2fa7c31470e SHA-1: fd51af3748fa70a137d25fbe294f1376f1e432d7 SHA-256: 271a1c717e140a42a104eb48232f1812c20683f570c796f12d5c9beb5f6d861e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Servicenow asset management pdf' and a URL that appears to be the primary lure. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to increase visibility and drive traffic to malicious sites. The ML classifier strongly indicated maliciousness.

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=servicenow+asset+management+pdf
    • http://files.knowyourhair.co.uk/uploads/1/3/0/8/130814187/pujumuxosefuk_lazugivogilaw_jibiwobowa_womow.pdf
    • http://files.bobwang1991.com/uploads/1/3/1/1/131164159/290faeab693.pdf
    • http://files.glencoeflorist.co.uk/uploads/1/3/1/8/131856276/nigijulozivedup.pdf
    • http://kelubozej.servecom.co.uk/uploads/1/3/0/9/130969440/mojolog_wanoxamonirot_wazawobep.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4070/files/lipaxekufakuboginu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/wanexarexalewubezip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/82024489759.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/vijobenokofowe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5572/4197/files/cp_snow_two_cultures.pdf
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/ganoderma_lucidum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/betuki.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3979/files/73207255259.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/biodata_format_for_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/mururomonajigowutijujepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7348/files/29407421321.pdf
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/xageluvas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d81.bin
18a84caf50f7268ab5dc331fa3a61ab45b11c2d7c07fb0487037f20d311eedfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D81 5484 bytes
font_01_sfnt_off0000801d.bin
adea6e1eb3dd9101148d17d4d395a2b2f6c94417d8a65d81d4fb31583385d84e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801D 11208 bytes
font_02_sfnt_off0000a5ae.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AE 4324 bytes

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