Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ecf47c5389e039f…

MALICIOUS

PDF

47.9 KB Created: 2020-08-04 19:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd15e679e654d2f93f22ee9645d0ad60 SHA-1: 98e4ea32dd89079b2dd632d22a59247fcd63aed1 SHA-256: 8ecf47c5389e039f64b56375dba277b34305f2e7cefd014d9b7c26fe14ce6186
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded URLs. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which likely serves to obscure the ultimate destination of the attack. Another critical heuristic indicates a large external PDF link farm, with many links hosted on 'cdn.shopify.com'. The document body contains the redirector URL and several Shopify-hosted PDF links, suggesting a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cotangent+bundle+pdf
    • http://files.classwithchris.com/uploads/1/3/1/4/131452922/lidirem_bavige_kinupepepazew_salegesabudu.pdf
    • http://files.patrickdeanhubbell.com/uploads/1/3/1/4/131454034/7177565.pdf
    • http://files.cheshireneuroactive.org/uploads/1/3/2/8/132815045/5706238.pdf
    • http://files.paxonphysics.com/uploads/1/3/0/7/130775506/bopusuboporuxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2166/files/mimatorodu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1394/6018/files/gotomibozokuxukogim.pdf
    • https://cdn.shopify.com/s/files/1/0435/6987/3054/files/ongc_annual_report_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/62022326211.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16216600544.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2354/files/wulitavenogo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mizamolapo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/54808172581.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/46344678748.pdf
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/80355721610.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/1940801049.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/biluzowovitegu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2282/6142/files/6246269731.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_off00006567.bin
fd02f87ddc33fe40556d2f34a9138f9c470551f2e4c00ba325a7b164d3bf9dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6567 4980 bytes
font_01_sfnt_off00007669.bin
f8d31e9cf090db315e669746ece8f604e7835a1f0a2d999d67e4b508f9da105a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7669 10996 bytes
font_02_sfnt_off00009c33.bin
d0f86685491820483e019dc62a2885d68abfc5c047010a3830812f985234d3a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C33 16432 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.