Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae836f074299db72…

MALICIOUS

PDF

51.0 KB Created: 2020-08-26 08:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b410712925423c1a33023471f3f93b88 SHA-1: e7ad18b95084a2085384a74512dc7b50c9c08c70 SHA-256: ae836f074299db72c5ff1299b290d74899bb67dea9be9fecfca3c52023a9f321
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=country+wood+stove+manual'. This indicates a phishing or social engineering attempt to lure the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=country+wood+stove+manual
    • http://tusawa.chantaljean-pierre.com/uploads/1/3/1/6/131606345/kexumopezewor_kozije_naralumumijalu_nasus.pdf
    • http://konaga.reflexologystudio.org/uploads/1/3/1/6/131606289/6043538.pdf
    • http://files.alliesimpsonartist.com/uploads/1/3/0/8/130814032/lozujimexilejub_dexow_wakajuzeri_wetini.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9680354999.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/75205076802.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/54396128058.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/dexerutazidofatinomix.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/noble_skyrim_sse.pdf
    • https://cdn.shopify.com/s/files/1/0431/8953/4869/files/66553136238.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/tevafosovukotana.pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7135/files/free_birth_chart_transit_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/77729203312.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0177/files/13345703440.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/peginawenilakisemiwufo.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_off00008aaf.bin
4af426246d9bbcf8c35f653ff3f489251f967e150febf7944f1fcc9d3a832fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAF 5132 bytes
font_01_sfnt_off00009c24.bin
115f4faf8ea74c022eb4b74d324a97c82a7970f3adbca6ca750007d3b6c93a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C24 10292 bytes

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