Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d6ed05810b7f47…

MALICIOUS

PDF

112.2 KB Created: 2020-08-12 14:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 983cdd771d9c6dd4ad8c9167e7fac758 SHA-1: aa70252bf85ec18a204c172a9174ee357fa287d3 SHA-256: 33d6ed05810b7f475da8b01371b038e0dd778a8cd1c5b6d7e0c970580e65d290
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to academic content. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting the user to a malicious site via a link embedded within the document.

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.cc/pify?keyword=biosynthesis+of+flavonoids+pdf
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • http://files.andrewbroomphotography.com/uploads/1/3/1/4/131437123/dusidetumafuzig.pdf
    • http://files.thehot-boxcompany.com/uploads/1/3/0/7/130739780/gaboneju.pdf
    • http://sidikijif.bluebridgelifescience.com/uploads/1/3/1/6/131606875/kabezepuromoseruna.pdf
    • https://cdn.shopify.com/s/files/1/0447/5322/3829/files/poemas_de_la_consumacin_vicente_aleixandre.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/three_letter_words_in_english_for_ukg.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/35948344063.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/wamitudobosobisotubuludu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/susajonidifumiwago.pdf
    • https://cdn.shopify.com/s/files/1/0447/6780/5591/files/botupebinol.pdf
    • https://cdn.shopify.com/s/files/1/0448/2508/4065/files/cause_fear_dnd_5e.pdf
    • https://cdn.shopify.com/s/files/1/0436/2053/2386/files/32169946441.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/76369342882.pdf
    • https://cdn.shopify.com/s/files/1/0428/5884/0223/files/1198099735.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/xomitirexegel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1999/files/livro_tecnologia_da_informao.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/wakorexujabu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6711/files/xolaxut.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_off00017186.bin
f34e7a42742a9b1f5768cfbf6259e90844bbce7d3dedd0bb3202e871deb018b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x17186 5244 bytes
font_01_sfnt_off00018367.bin
a47eeefdaf9b2beacf2232d1cca26f758f3c9fa970202a6e3627126cd2f2f62e
pdf-font-stream PDF embedded font (sfnt) at offset 0x18367 15456 bytes