Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f8ca72198315f71…

MALICIOUS

PDF

36.2 KB Created: 2020-08-20 08:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97e2422b4eebaae7eb8c212c2aba8b48 SHA-1: 982e8a355fbe966f2128775933a015570c73b75c SHA-256: 8f8ca72198315f71536aa985a8caf68c62186cc676e1f6a4d0e72465e3e5e9b9
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a malicious redirector and link farm. It contains numerous embedded URLs, with a primary link pointing to `ttraff.com`, a known malicious redirector. The presence of a large number of external PDF links, many hosted on `cdn.shopify.com`, suggests an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly indicated maliciousness.

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=amsterdam+plano+turistico+pdf
    • http://luligifi.stcolette.net/uploads/1/3/1/4/131454012/56f70d6cd485.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/rolamudolimotevoraxojivur.pdf
    • https://cdn.shopify.com/s/files/1/0433/7657/4620/files/44327259643.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/xakituvabugopuxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/23376351842.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/seagate_blackarmor_nas_440_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/3173/6998/files/47846641543.pdf
    • https://cdn.shopify.com/s/files/1/0438/2480/8096/files/free_responsive_css_admin_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/9036/9959/files/maharashtra_imarat_bandhkam_kamgar_kalyan_mandal.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/19413398283.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/tabikataveg.pdf
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/adobe_acrobat_pro_crashes_when_opening.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/pdf_split_and_merge_small.pdf
    • https://cdn.shopify.com/s/files/1/0432/7306/0520/files/13398559645.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_off00005092.bin
34b81204bfcc825b203102606bfa5d6d4c3acfcddafba0d96accedebc7d7bca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5092 5288 bytes
font_01_sfnt_off00006275.bin
3fcf6e14b9e126cbd25e7dbac05611e25435ea0e2c25ce96da8d33b6f65806f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6275 9888 bytes

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