Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1be7ecd94130eee…

MALICIOUS

PDF

47.5 KB Created: 2020-08-17 02:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e2468c2310abfaefcd27c271b852657 SHA-1: 60ca8708a94e2aa43d774653c5a9c1d5d9ae894a SHA-256: d1be7ecd94130eee96537cf5d7ab807937fa5664239cbff217a4238585fb1c96
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `ttraff.com`. The document body, though heavily obfuscated, contains the same URL and a movie title, suggesting a lure. The presence of numerous embedded links, many hosted on `cdn.shopify.com` but some on suspicious domains like `tojamov.borderstarpta.org`, further indicates a link farm or distribution mechanism. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=attu+tamil+full+movie+online
    • http://tojamov.borderstarpta.org/uploads/1/3/0/8/130874388/tijorebe.pdf
    • http://files.kandhoo.com/uploads/1/3/2/6/132681409/fosanakimiki.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/29555430687.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/picture_oxford_dictionary_english_vietnam.pdf
    • https://cdn.shopify.com/s/files/1/0431/7796/7778/files/coupon_voucher_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/birthday_photo_setting_app.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/aloha_ke_akua_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/xamonimawebojuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/6753012730.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/tajizekukuguk.pdf
    • https://cdn.shopify.com/s/files/1/0436/1073/4755/files/runijipobejilexodarev.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0735/files/53440871886.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00006a46.bin
15346a23398b9c71538e0371191684d4f3187ec84b54781a2b8bf4ffcfda13c0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6A46 14756 bytes
font_00_sfnt_off00005a5f.bin
178764b3216b338b28988471639d664305dec79c628cb123aae700d893b764ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5F 4688 bytes
font_02_sfnt_off00008d8b.bin
fd64ff70f99509aa77acc2feecafb8e4b99cb2450994d12977fbf26b2e18122c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8B 10388 bytes

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