Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b6dfbe72a6ae38…

MALICIOUS

PDF

48.8 KB Created: 2020-08-31 00:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fefbc3800c875b81f5dde3ee07e7838 SHA-1: cf5075b7e71fa5ea37342f511012b571c9a91806 SHA-256: 08b6dfbe72a6ae384d73c49bdd869902dd5b3a43b25bf5694ebcd799cce3803b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector URL. This suggests an attempt to lure users to malicious content, likely for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL reinforces this assessment.

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/wix?keyword=enochian+angel+sigils
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a48928_d1200380486e4a118755b013f51f4155.pdf
    • https://static.usrfiles.com/ugd/8b49c6_1ffa05df73bd4089956e2b274e4f19f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f9a4365e1224fc896f2ac8074c61f03.pdf
    • https://static.usrfiles.com/ugd/b8c837_1074e07e95a047e0bbf8a828a259661f.pdf
    • https://static.usrfiles.com/ugd/b8c837_59b7a49e46a640fcbb773e310f94799e.pdf
    • https://static.usrfiles.com/ugd/97aff7_5a111d1860954ef7b098818857d726b0.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_721ac1a32a324741817900bacf32a217.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb61bb87e9a64ea386d2fa067ed39b9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_26bb621c7d8248298c8faafd44e75198.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f3c9b208a314ac3b35194506fae5083.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4751/files/idioms_worksheet_7_answers.pdf
    • https://cdn.shopify.com/s/files/1/0462/6386/1405/files/bellringer_worksheet_ratifying_the_constitution.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/young_living_essential_oil_starter_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/lymphatic_system_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/79160390115.pdf
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/8117423806.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4643/files/14684666429.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_off0000823a.bin
6ae30fe78faf82febc73afed7b6c2e6d951f681c92a36047603d54b8d0664ee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x823A 4924 bytes
font_01_sfnt_off000092f4.bin
8bd8c1efb7a8c2a651494c8282fbe69815bbc2c88265dda4549e99ad98613300		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F4 10572 bytes

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