Malicious PDF — malware analysis report

Static analysis result for SHA-256 458506003f524d54…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 17:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4530782384c81eeb187fc244d47cca3 SHA-1: 3dbdcc0b2cca0a0ae606a1570067c7a3c027054b SHA-256: 458506003f524d541e17a2205916839261f010253c868d06b063871fb2f6c9ba
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, though heavily corrupted, contains the malicious URL, suggesting the document's primary purpose is to lure users to this redirector.

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=revenue+recognition+methods+pdf
    • http://files.lashnessco.com/uploads/1/3/2/8/132814898/suveximejurot_gimaz_losiw_vesap.pdf
    • http://faveke.tundratrailtech.com/uploads/1/3/1/4/131438405/3775110.pdf
    • http://files.krystianalisha.com/uploads/1/3/1/8/131856995/gumowivesol.pdf
    • http://files.allsaintsparkslope.org/uploads/1/3/1/4/131453333/9537998.pdf
    • https://cdn.shopify.com/s/files/1/0448/1400/8486/files/bilunovanevowiravapeku.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/46644149219.pdf
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/77408719426.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/gawenonelopenotipomad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/vexakekejisesu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/bilingual_dictionary_french_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/1375/7339/files/texipokapirezo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6378/5112/files/93880382828.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_off000069df.bin
cd1ba18185dbf0d7b40912ed5d8c6dcea40f701ad129e4a6476896f1f1f7bab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 5396 bytes
font_01_sfnt_off00007c1c.bin
9e9843893b2e9163538222449509e888a12f622c731d4a1354b3afddd4ca0faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1C 10144 bytes

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