Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b8248446a23fa6…

MALICIOUS

PDF

46.8 KB Created: 2020-08-08 23:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1772cf4ebaffaccda8caa104ddca20a7 SHA-1: 6d09e1bedc52bdcb06236303736471ef7497cf9d SHA-256: 76b8248446a23fa6cbf06b58982d68ae67819ff3adc3d752572c36739c07d841
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=swing+trading+ebook+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=swing+trading+ebook+pdf
    • http://files.core-nmsu.org/uploads/1/3/0/8/130814288/jabitijatufo.pdf
    • http://files.desertheartsphoenix.com/uploads/1/3/0/8/130813714/4581947.pdf
    • http://files.atholtonmusic.org/uploads/1/3/0/7/130776787/279915b1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/adobe_trial_expired_reset.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/kometujonigevutaxez.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/vunivawidivuzajukak.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/10863395945.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0807/files/92236474248.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2792/files/algebra_and_trigonometry_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22411539251.pdf
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/20563329319.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/zidakelefetajabowizimexeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9613/files/didolulid.pdf
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/massey_ferguson_231_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6576/9110/files/51912294843.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000773c.bin
8325e6263bb722b90d9d60eed46fd0e1108012996d0d695fe4f4b35b9fec86bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x773C 5396 bytes
font_01_sfnt_off000089bc.bin
59cfa33c8bff03b9fbd9658984a9ce5ebb9849a26483ca4860ab429dabdbc020
pdf-font-stream PDF embedded font (sfnt) at offset 0x89BC 10676 bytes