Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1a93065d031bb0…

MALICIOUS

PDF

56.5 KB Created: 2020-08-15 23:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fd98f2c08714c0ad9de8c633fdab682 SHA-1: b9d58e2a15823581186e1b574124ee3854b39e46 SHA-256: ad1a93065d031bb08d404c201d5a5aec7aa799098b07750a4bfdb6f32323103a
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or redirection attempt. The presence of a 'download button' heuristic further supports the lure of clicking a link. The primary malicious URL identified is https://ttraff.cc/wb?keyword=roller%20conveyor%20design%20manual, which is likely used to redirect the user to a malicious site.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=roller%20conveyor%20design%20manual
    • http://files.theskinthatburns.com/uploads/1/3/1/1/131164534/f66e7e2f6bf.pdf
    • http://files.debbieandriullidesigns.com/uploads/1/3/0/7/130775840/videvorosogas_patomosa_xerusovi_dugadoxa.pdf
    • http://files.rmhsperformingarts.com/uploads/1/3/1/6/131607374/jodalomi_jixelobi.pdf
    • http://fepadosel.idahohorsecouncil.com/uploads/1/3/1/4/131406709/7691794.pdf
    • http://files.unitedinstitutions.org/uploads/1/3/0/9/130969791/pulekuri.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6917/files/55963886142.pdf
    • https://cdn.shopify.com/s/files/1/0428/3501/7895/files/32101205689.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/kobudodakusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/84675857118.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakorijupomimenupe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/95201173504.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/vejudebitatiwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8059/8172/files/poveragudasunatu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files/osrs_tzhaar_ket.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/bopukugepipa.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/
    • https://cdn.shopify.com/s/files/1/0430/7

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094d8.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x94D8 2828 bytes
font_01_sfnt_off00009ed2.bin
695ac599d24f0bde8b03581fd386d0292529dbc62b34e2d7afda4e163013c1e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED2 5428 bytes
font_02_sfnt_off0000b13b.bin
7132a2b9d4ec981e70ddb8b352d23925d0804f2964e494b51f0d395f1caad01f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB13B 9792 bytes