Malicious PDF — malware analysis report

Static analysis result for SHA-256 c109a1c041ea5fa3…

MALICIOUS

PDF

43.4 KB Created: 2020-07-30 13:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc18e613b3a5359544764ac613cfc1b0 SHA-1: ed75b12eeebfe39e3769329adda69396b92de1c0 SHA-256: c109a1c041ea5fa3e0e68fe460e37c71987185f09943e626cd2fef2ae6952d70
152 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 a PDF SEO link farm pattern, with numerous links hosted on 'cdn.shopify.com', suggesting an attempt to distribute malicious content or lure users to malicious sites. 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=cuadro+medico+asisa+murcia+2020+pdf
    • http://files.amandabarnaby.com/uploads/1/3/1/1/131164129/ganarilopijidal.pdf
    • http://files.sacredfireacupuncture.com/uploads/1/3/1/4/131437683/5c1b0.pdf
    • http://files.glorybeehoneyfarm.com/uploads/1/3/1/6/131637108/4146641.pdf
    • http://files.restorehopeliberia.org/uploads/1/3/1/4/131407635/5cbbf1d4d783.pdf
    • http://files.yogalotuspond.com/uploads/1/3/2/8/132814935/5c8f75f8.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/83032239143.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/wimazilupipomagufisade.pdf
    • https://cdn.shopify.com/s/files/1/0428/4317/7126/files/zebawovu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/bisesutaxene.pdf
    • https://cdn.shopify.com/s/files/1/0434/7589/4437/files/midibizekal.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/90784111388.pdf
    • https://cdn.shopify.com/s/files/1/0428/0804/9830/files/39072119184.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/gaxinesotureniserorabox.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/xivalekelowalolateliwunat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/76386355681.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1638/files/81670436160.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/boguxexu.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_off00006884.bin
aa349510321e2e5276a7f652a9962a38eff4772208785bd926bc1e55321c3b73
pdf-font-stream PDF embedded font (sfnt) at offset 0x6884 5260 bytes
font_01_sfnt_off00007a65.bin
2b3589e493c4b132e52308095feeb5c1177d82faeed99c25c01aeade81889ba2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A65 11144 bytes