Malicious PDF — malware analysis report

Static analysis result for SHA-256 6830958269a8dd2d…

MALICIOUS

PDF

54.9 KB Created: 2020-08-17 13:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd4eaff18b0bbb87ee73c747fcbdf01c SHA-1: 5e9ae4eb0175fb8aa6fb2f371e01b4e8c1fd1f91 SHA-256: 6830958269a8dd2da7ba28d0939ad845baea00e596307455f10e0b6f1f7254b7
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=fansipan+trekking+guide'. The document body, though heavily obfuscated, contains text related to 'Fansipan trekking guide' and also includes the malicious URL, suggesting a lure. The presence of many external PDF links, some benign and some potentially malicious, indicates a link farm or redirection strategy. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=fansipan+trekking+guide
    • http://zalel.kidscottagekg.com/uploads/1/3/1/6/131606027/08da33ac2cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/salukogarozofalipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/jujufuvusepujaxazutetixu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3757/0710/files/4643805872.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/zufanegutenipat.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/laginajigubunifot.pdf
    • https://cdn.shopify.com/s/files/1/0431/8137/5648/files/sasake.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/77703675343.pdf
    • https://cdn.shopify.com/s/files/1/0439/1128/2843/files/tafiwulapuvo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/wekutafibalonig.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/camus_the_plague_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/pikexe.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078a1.bin
b46a95a34cc6bbdbfce84a200a0ce45c467ad58819568ed8081e461d69b3d39c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A1 5112 bytes
font_01_sfnt_off00008a0a.bin
c9c850e9c351ce199d5e9d1c42a783cd39d33267a74ccb43d8a2fed304f07254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0A 1796 bytes
font_02_sfnt_off00009295.bin
ff4ce7838aed27fde86bb34c9d2dc0d329bb4feda11b0efb0ae1a0a444eec172		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9295 11816 bytes
font_03_sfnt_off0000b8e0.bin
de4d8b2f57bd79f1a868fabda613d9936b110e31710edd4728466090b424b6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E0 16340 bytes

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