Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c85bd0cb783ffa2…

MALICIOUS

PDF

51.7 KB Created: 2020-08-09 16:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5b5fb055b399a22b9f5e632f163d995 SHA-1: 2db03dac0404e9a15a9d8b5e3588a37b1e049cf4 SHA-256: 9c85bd0cb783ffa25df42684d381fb2570ca2e33f3d2d9e6b8ecc32f6da42e02
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at `ttraff.ru`. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=ancestors+in+african+traditional+religion+pdf
    • http://misogi.tequilatoo.com/uploads/1/3/1/0/131070420/a1543a84e.pdf
    • http://rojipakuf.triplethreatns.com/uploads/1/3/0/7/130738614/1767825.pdf
    • http://files.juliaselectrolysis.com/uploads/1/3/2/7/132741136/sejenela.pdf
    • http://xaseta.worthyfood.net/uploads/1/3/1/6/131637016/74155d7972.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/dell_r710_specs.pdf
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/mutuwozupagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8782/files/ronulevudobuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/original_aramaic_bible.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9845/files/16994202257.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/the_data_warehouse_etl_toolkit_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9290/2039/files/vijebede.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8537/files/yasin_sharif_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3928/files/5786507966.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1029/files/carcinoma_epidermoide_in_situ.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/98272876936.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/alcatel_lucent_manual.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_off00008e34.bin
9fb24d3cf33723c1651ed415b110d78a51e774f779b32d8be9b12b150ffd75a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E34 5312 bytes
font_01_sfnt_off0000a058.bin
fe872ee7171d8edf4b9dffef20d7c64caa1945f29253f4bec1710a8c4ef640b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA058 9884 bytes

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