Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9dd653f34f86448…

MALICIOUS

PDF

49.5 KB Created: 2020-08-18 17:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00863bdb6e47e1329e4efb93d9337741 SHA-1: a90aa0bd2f41e0651480d75c30b3ea2e487e58dc SHA-256: a9dd653f34f864486837034f6dc6987206693969ed9004ea2d9e2be90e176095
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many of which point to a link farm hosted on Shopify. 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 corrupted, contains text related to the 'skilled occupation list canada 2017-18 pdf' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=skilled+occupation+list+canada+2017-+18+pdf
    • http://saged.goodbooks-toread.com/uploads/1/3/1/4/131406650/rujoterixi.pdf
    • http://files.coderedpicturecompany.com/uploads/1/3/1/3/131379743/6229699.pdf
    • http://torozolu.prinevilleredemptionhouse.com/uploads/1/3/1/3/131398285/mogujufu-zisufoverakufez-gifada-mowimuxonidilu.pdf
    • http://files.riversedgetownhome.com/uploads/1/3/1/6/131606262/mibatom_xebatopetusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/82145705903.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/the_vanquished_generals_and_the_liberation_war_of_bangladesh.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6511/files/81089494888.pdf
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/rumasunibunebis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/das_apokryphon_des_johannes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5361/2199/files/festival_alleluia_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/josanu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9172/0347/files/21582242314.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/26468678047.pdf
    • https://cdn.shopify.com/s/files/1/0435/0623/7604/files/22139794156.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/65897836821.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_off00008222.bin
50480d412a5f992e78f28ae00973a636cbcebddb34c27b65ef2112f6b942a742
pdf-font-stream PDF embedded font (sfnt) at offset 0x8222 5852 bytes
font_01_sfnt_off0000962d.bin
c62c77e329969f95671e1c749269e9e485cb84d48539d1ce3951638605d82c97
pdf-font-stream PDF embedded font (sfnt) at offset 0x962D 10164 bytes