Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9642a2daed45e9…

MALICIOUS

PDF

41.5 KB Created: 2020-08-13 02:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d40f1e5417a83b81e38d7a846935ea15 SHA-1: f9aa2af770f3ed7b9252dc73ce8bbfc8f2b9591f SHA-256: 4e9642a2daed45e96642a7882152e92c88156f58c76b561f474ca2f241874dd8
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.ru/wb?keyword=io-540-k1a5%20overhaul%20manual, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL, suggesting a lure to download a manual which redirects 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.ru/wb?keyword=io-540-k1a5%20overhaul%20manual
    • http://files.ammiejeanphotography.com/uploads/1/3/0/7/130776225/8490616.pdf
    • http://files.ualssa.com/uploads/1/3/1/6/131606248/putebawumowiwija.pdf
    • http://files.brianpatrickotoole.com/uploads/1/3/1/4/131437233/tazaki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/27764923668.pdf
    • https://cdn.shopify.com/s/files/1/0437/6789/0069/files/project_rationale_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2557/files/kaxumeferiwenanobuvep.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/jebipajifibe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7639/files/28498787131.pdf
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/61177755736.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/wogokobenetejomonebuvawem.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/bu_tri_trong_qu_trng.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/zudepuse.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/mipunakovazoja.pdf
    • https://cdn.shopify.com/s/files/1/0436/9966/7112/files/camillo_sitte_the_art_of_building_cities.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/xipemuxipemen.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/boxumagajirozox.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_off000062d9.bin
609cc2fa8c394afb72ec13f963042f7ecdd249f4865e77c4d3a0a1d047b34152
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D9 5248 bytes
font_01_sfnt_off0000749e.bin
1fe1cd7e14debb84a639409682e65b3dbd777ce4980221d14fda3f763aad2063
pdf-font-stream PDF embedded font (sfnt) at offset 0x749E 11076 bytes