Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8c570a535f397a…

MALICIOUS

PDF

42.9 KB Created: 2020-08-10 14:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80c7ca59fb7368d6e5fe761a54c6d21c SHA-1: 148aaba80a768d623ec3a6fa03733e2f9834d6fe SHA-256: aa8c570a535f397a34ef623f31837f9646c662d7b022cf7f75264f1f66f097cd
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the text 'Barbell workout routine pdf' and the URL that triggered the malicious redirector heuristic, suggesting a lure to trick users into clicking the link. 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=barbell+workout+routine+pdf
    • http://files.garriotthomes.com/uploads/1/3/1/4/131482941/bemokixugija.pdf
    • http://lukom.cellcityshop.com/uploads/1/3/0/7/130739625/bidomejoresapa.pdf
    • http://sesexuku.stirrednotshakencincy.com/uploads/1/3/1/1/131164250/pijonevu_detinoxawota_zoruf_wogemixi.pdf
    • http://files.actdu.org.au/uploads/1/3/1/4/131454883/2285660.pdf
    • https://cdn.shopify.com/s/files/1/0434/2959/3245/files/fuwasojajaruxorobafoji.pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/28456916616.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/domenafuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/5884/0223/files/59289204402.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/12305564491.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/kesewopidufowulogo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4785/files/case_study_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/valumavurozapoxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3828/5734/files/sejojovozof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijufetibumumupaxewaromuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/28465331802.pdf
    • https://cdn.shopify.com/s/files/1/0430/5492/3925/files/64671455192.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/bisigepumagenidodipun.pdf
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/47176995629.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_off00006a31.bin
5264700d0054fc6afa329afcb0bd6be8970adbdd395813227d3c75dec0050925
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A31 5200 bytes
font_01_sfnt_off00007c04.bin
243b5d9f700ca16b9e4cad7ce72de816b8df707f9c3098a6381bed401dacc42b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C04 10168 bytes