Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2bd1a7ea8b9579…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 16:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdb635810ff30962a780de660c6905e8 SHA-1: 6e051e6144ee1e1f2ef88902f20ac17c5d53d363 SHA-256: 1f2bd1a7ea8b9579cc32113eb5899a74545085ba54c800713911c5cd885f0905
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL and a list of other URLs, suggesting a link farm designed to lure users to potentially harmful sites. 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=meiosis+1+and+meiosis+2+worksheet+answers+pdf
    • http://xikuveg.marianimediation.com/uploads/1/3/0/7/130775904/zobemafigafoxalidumu.pdf
    • http://files.greatwhiteadventures.com/uploads/1/3/0/7/130775590/7215655.pdf
    • http://files.radicalhealing.us/uploads/1/3/0/7/130776786/4246df1a.pdf
    • http://files.rockinghamlimo.com/uploads/1/3/0/9/130969591/nabakedulasam_fakixiworas_suxulil_logazag.pdf
    • https://cdn.shopify.com/s/files/1/0438/4430/5061/files/50350156227.pdf
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/28711881718.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/60773138351.pdf
    • https://cdn.shopify.com/s/files/1/0435/2845/4298/files/understanding_and_using_english_grammar_4th_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/bacteria_cell_structure.pdf
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/rozenirowukesosife.pdf
    • https://cdn.shopify.com/s/files/1/0431/9081/2821/files/54356736024.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/tesibixekunoramuwumekodu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/31334794402.pdf
    • https://cdn.shopify.com/s/files/1/0436/5362/8062/files/65891726789.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/pdf._js_print_blank_page.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_off0000662f.bin
db818a07fb49f80614734f596a2a588dbca0d89691b8d8221ee84ba3dd9ebd25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662F 5596 bytes
font_01_sfnt_off00007933.bin
edbde7f27a6b90e920f371ec524b8269af63be8bd2ba6b92363d1fe521ac896d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7933 10140 bytes

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