Malicious PDF — malware analysis report

Static analysis result for SHA-256 49da8414c8e35cdd…

MALICIOUS

PDF

67.8 KB Created: 2020-08-10 08:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dab6563dcd9b4a95e7c1f4909793708 SHA-1: 4c392946641dbd281148085cd3e14b9a07a68e75 SHA-256: 49da8414c8e35cdd56d088098caa37bc178ab2ec5145a9347f042d676fa12014
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=the+anthropocene+human+impact+on+the+environment+pdf'. This indicates the document's primary purpose is to redirect users to a malicious site. The presence of a large number of external PDF links further supports a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=the+anthropocene+human+impact+on+the+environment+pdf
    • http://files.craighouk.com/uploads/1/3/2/8/132814624/winezeru-kezomiweramaj-fijemidisa-mafuzukonoxi.pdf
    • http://files.sulaymansaho.com/uploads/1/3/2/6/132682882/3e1037b4.pdf
    • http://files.chantillyvolleyballclub.com/uploads/1/3/1/8/131871602/4653758.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/nidoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/nuparulowawofadiboze.pdf
    • https://cdn.shopify.com/s/files/1/0450/1363/1140/files/jofinusanonepotawaxazib.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/33539291183.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/git_reset_remote_origin.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/pifojasi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/denso_navigation_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/7624170436.pdf
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/largest_city_in_america.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/coleman_generator_5000.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/nazi_banner_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/92569624452.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b671.bin
9049bc11098ceb97a5a213ce7fd01a39dc4c92db08b072c15b50976dc2a0098f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB671 5192 bytes
font_01_sfnt_off0000c7fc.bin
da9a59f36035b81ac123e5833ac812fb80c78b2f5e87d50d77140c1ea91d21e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FC 10496 bytes
font_02_sfnt_off0000ec23.bin
49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 16148 bytes