Malicious PDF — malware analysis report

Static analysis result for SHA-256 d666b2ff586fd74c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-10 21:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73f44c599ed188ac776b890b85a01a28 SHA-1: 5e4a06500297d3bbc4580155389c6134eacd779d SHA-256: d666b2ff586fd74c68803d4e27e7abaa2d66b4f6d4398d078ed89fc8e99e613a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to a link farm infrastructure designed to redirect users. One critical heuristic firing indicates a direct link to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains this same redirector URL, suggesting the primary purpose is to lure users to malicious content. 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.cc/pify?keyword=active+and+passive+voice+sentences+pdf
    • http://files.rebuildhopekansas.org/uploads/1/3/1/6/131637047/5633b8a34652d8d.pdf
    • http://files.ndhinc.org/uploads/1/3/1/3/131384301/4593927.pdf
    • http://files.haulksmaple.com/uploads/1/3/1/4/131454620/pebivowus.pdf
    • http://lenoru.peeblesfootball.com/uploads/1/3/0/7/130775732/fiwozu.pdf
    • http://nojijutaj.mxvisolutions.com/uploads/1/3/0/7/130776483/bidosefusajaveg.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/bisezobukosixurone.pdf
    • https://cdn.shopify.com/s/files/1/0434/7192/9496/files/absceso_hepatico_amebiano_gpc.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/tyler_mahle_fangraphs.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6386/files/12546549723.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2332/files/72954421421.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/destiny_2_forsaken_imdb.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1822/files/2_2_cycloaddition_reaction.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/dna_replication_in_prokaryotes_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/sap_bpc_10._1_training_material.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/shawn_wasabi_soundcloud.pdf
    • https://cdn.shopify.com/s/files/1/0434/9794/7300/files/node_js_logo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7568/1947/files/altura_uterina_segun_edad_gestacional.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_off00006736.bin
2dd3e0b6f2e3b6d383ea91962dd4c54d1be1003e4aca1cc779de65066ef67fe5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6736 5068 bytes
font_01_sfnt_off0000788b.bin
a40bc10c3add07b821a7a3c6becbadce5dc0d3076eeb11fd49026cf12b51c8a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x788B 10172 bytes