Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1a947991d69588…

MALICIOUS

PDF

46.7 KB Created: 2020-07-29 22:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 775bad76078ed008f29d603e4cfdee19 SHA-1: 82b2ffdb9c01e9aba5bc138e0ab671608adc83a6 SHA-256: 9b1a947991d69588a85e23479f6a52cde96b11591c6fe130acae6d86e8090710
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=aggression+definition+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body is heavily obfuscated and unreadable, but the presence of these links strongly suggests a lure to external malicious content. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=aggression+definition+pdf
    • http://files.buildhealthyseniors.com/uploads/1/3/0/9/130969045/8871714.pdf
    • http://files.waterfrontlotspei.com/uploads/1/3/2/7/132710700/7589548.pdf
    • http://files.finewineandesotericspirits.com/uploads/1/3/1/6/131637850/xetefewilugibisixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/gemafej.pdf
    • https://cdn.shopify.com/s/files/1/0436/3714/5753/files/xejifevofixulujagelalok.pdf
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/79663717079.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/faxizowuvurafekaxukiverox.pdf
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/xasibanizepiboxiru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/62712876271.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/70276512975.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/siriramaxirosamuxufav.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/zuxeju.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/bijigevidoxalofedumasane.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/
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/xas

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bb9.bin
45ae0559be9b842938e4b5f73513b2fe9190b9074767f8e29da692e16ed5feb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB9 4744 bytes
font_01_sfnt_off00008be9.bin
6d357e9022f2b8639e97a4fd02e7fd72b383a26f04e3d7c63eb7462ee24872bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE9 9896 bytes

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