Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8af14746dece81e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-13 15:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3db87f1aff80aaae549f5bbccde40de SHA-1: cd60ef0b7b6b238440d00bac293af7f8c139b18c SHA-256: c8af14746dece81ebee0cee789ffb125ac057d4ba008d4d2adc32809ceb6d1a5
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded links, particularly the one pointing to 'ttraff.cc', are indicative of a redirection chain designed to lead users to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of links and the malicious redirector suggest a delivery mechanism for further malware or phishing 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=heograpikal+na+varayti+ng+wika+pdf
    • http://files.clovellypublicpandc.com/uploads/1/3/1/3/131382470/08fd4b98b095.pdf
    • http://files.wilmingtonedfoundation.org/uploads/1/3/0/9/130969220/9030232.pdf
    • http://files.doublemindedgod.com/uploads/1/3/1/8/131857758/970076dd2.pdf
    • https://cdn.shopify.com/s/files/1/0439/6548/1118/files/36569270524.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3366/files/sinubupiteneg.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/21336885439.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7397/files/how_to_hack_cool_math_games.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/monokuma_theater_morse_code.pdf
    • https://cdn.shopify.com/s/files/1/0429/0818/8839/files/jizazarakiko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/63719549788.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6198/files/nemeloxevoponajulogizu.pdf
    • https://cdn.shopify.com/s/files/1/0448/0483/3441/files/job_motivational_letter.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/fake_airline_ticket_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/genetics_pedigree_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/49843924598.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_off00005f48.bin
54fb50ec4a9a182606d76c52b045d314d9ee95560fab84c3230567c319ba30d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F48 5308 bytes
font_01_sfnt_off00007185.bin
3047984f1237d9bfa698292ea633a92a3f37a31c6a71923548d144bf687cbc4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7185 10536 bytes