Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8dfa2472f77f20…

MALICIOUS

PDF

45.7 KB Created: 2020-08-03 03:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 410a1179ff948fd0c8e066a656106d55 SHA-1: 33d120324f4df29a8f68b9672cfc18cebac550f3 SHA-256: 4b8dfa2472f77f20cda911dad03ec8ac9da680cc359cbf6cd2ff590d921b2cc1
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/pify?keyword=git+set+upstream+branch' which is flagged as malicious. The presence of numerous links to external PDFs, many hosted on cdn.shopify.com, suggests a link farm or SEO manipulation tactic, potentially leading to further malicious content or phishing attempts.

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=git+set+upstream+branch
    • http://files.huttdesigns.com/uploads/1/3/1/3/131379678/f896e90dac.pdf
    • http://files.studyyourwaynz.com/uploads/1/3/1/4/131454549/8450173.pdf
    • http://files.louiskugelman.com/uploads/1/3/0/7/130739593/voxurunuzerujiv-kixorunifaz-zagala-vibebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9857/0909/files/pivawuxedulumosuxul.pdf
    • https://cdn.shopify.com/s/files/1/0432/0968/7208/files/wuzudokewove.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/50680847035.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74731072541.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/virobuzidatokejenosolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/buxexugomakodosojorabi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5723/1525/files/32921018278.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/gafiponejoxenelakug.pdf
    • https://cdn.shopify.com/s/files/1/0435/7573/8527/files/te_quiero_adorar_letra.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/potion_of_harming_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/watixisitemufefisawedawa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/dibabuzatepivisumeso.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_off00007401.bin
e2979b37ce7cc37574583a25d629327dd8871bed99a6f6b435624700d4d52299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7401 5312 bytes
font_01_sfnt_off000085e1.bin
6bdb18ac649cde68820eaccad1eebde44373f65f3c5c86c1211f98cfe8e2aa04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E1 10680 bytes

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