Malicious PDF — malware analysis report

Static analysis result for SHA-256 834cbd6d0a75f0ea…

MALICIOUS

PDF

43.6 KB Created: 2020-08-13 23:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f6f68bf557649be23885b67a6345813 SHA-1: 4dd075d58c8709665f0aef5e57671dfd2ba08ae4 SHA-256: 834cbd6d0a75f0ea2411a316644e6df5288e8a5fba9745a24d9f6e672392ebd2
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains a string that reconstructs to 'https://ttraff.com/pify?keyword=robbery+bob+apk+rexdl', indicating a lure for potentially malicious content. The presence of a link farm further supports the malicious intent of distributing unwanted content.

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.com/pify?keyword=robbery+bob+apk+rexdl
    • http://janori.embracingspirit.net/uploads/1/3/1/6/131606552/fe2fc28fffb86.pdf
    • http://files.erinaxelrod.com/uploads/1/3/1/4/131408415/2b22150.pdf
    • http://files.saveurlifeoutreach.com/uploads/1/3/1/0/131070152/3043841.pdf
    • http://files.thefemalescribeofgod.us/uploads/1/3/1/3/131380875/68b82be3d33b457.pdf
    • http://files.overlordtattoo.com/uploads/1/3/0/8/130814232/xigazu.pdf
    • http://files.thefemalescribeofgod.us/uploads/1/3/1/3/131380875/68b
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/dozoriw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/podom.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/kukumejusi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3258/files/56591330234.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/ekstrak_belimbing_wuluh.pdf
    • https://cdn.shopify.com/s/files/1/0433/5383/3637/files/96052680457.pdf
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/13259720933.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4455/files/free_download_spoken_english_book_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0435/2786/4469/files/lovoso.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/6378813586.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/60078887369.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b66.bin
d19a0bb8f7e47f7fdc15cc87df0848c4ef8f2a7b86aaadc605bfe76b893a08b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B66 5156 bytes
font_01_sfnt_off00007d02.bin
ebceab2388860b72a3cd05975b34e9b7249dddd68bcb915c27131c5b1bb37dc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D02 10652 bytes

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