Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd983efcadc3523…

MALICIOUS

PDF

48.8 KB Created: 2020-07-31 10:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7460d297f243b4599443e41609907d51 SHA-1: 1e36fb09f58c0ecac494c3b3131e38b7fabf34f7 SHA-256: 9dd983efcadc3523ec400949e0cd30d32fd694beef2b8c071fee1fa07c833cb6
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One such link points to 'ttraff.ru', which is flagged as a malicious redirector. The document body appears to be obfuscated or corrupted, but the presence of the 'apollonius theorem proof pdf' keyword in the malicious URL suggests a lure to disguise the malicious intent. No scripts were extracted from this sample.

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.ru/pify?keyword=apollonius+theorem+proof+pdf
    • http://files.jacqulinesmith.com/uploads/1/3/1/8/131858592/saluvuxalaje.pdf
    • http://files.dirtydrinkdesigns.com/uploads/1/3/0/8/130813701/rekekeja.pdf
    • http://files.savannah-aerials.co.za/uploads/1/3/1/1/131164386/2946549.pdf
    • http://files.williamsolmedo.com/uploads/1/3/1/4/131438038/pupema-duzufi.pdf
    • http://files.amandaschupak.com/uploads/1/3/1/4/131407668/pureb-duxosoju-xowakijinutel-tepevuzore.pdf
    • http://files.dirtydrinkdesigns.com/uploads
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/62309988696.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/nerowo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/juralaparagojajejivod.pdf
    • https://cdn.shopify.com/s/files/1/0431/9091/1137/files/zizufabel.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/84961857415.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/30663870002.pdf
    • https://cdn.shopify.com/s/files/1/0435/3517/1736/files/99511476810.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/ruxekoluwasujiwelerise.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/95032939930.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/xuvawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/ganiwusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/xekikavupixalokag.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/89042468080.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d4b.bin
229282c42be7131f57c23e498abb6082fef1b749777da960f0a782739407e67f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4B 4940 bytes
font_01_sfnt_off00007de1.bin
0a1f97637f9e8e20bf85ef5f2432052c362ef3fdd90c8d72ee3c0a9f1e3a73f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE1 10168 bytes
font_02_sfnt_off0000a0ca.bin
4d7a3a5f03612840c5c42154f561dda5bf4c39bad8940d4d4555f99834bacb02
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0CA 16096 bytes