Malicious PDF — malware analysis report

Static analysis result for SHA-256 61044a068d566afe…

MALICIOUS

PDF

43.6 KB Created: 2020-09-01 07:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c7c395a4a68870e91225556f09e9592 SHA-1: 8ca571d57c7820268aa332deaaad158fc0fe1e6b SHA-256: 61044a068d566afe3ffacdc60fff87e81e46adb109e3f7d3cf3ea47d1fcbebce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that leads to a malicious redirector. This suggests an attempt to direct users to malicious content or phishing pages, likely delivered as a spearphishing attachment.

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.link/pify?keyword=thickness+of+aluminum+foil+lab+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/fuel_pump_cavitation.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/melasaragonivokever.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/57543962237.pdf
    • https://cdn.shopify.com/s/files/1/0437/2824/0794/files/rubilevojukasufewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4459/files/multiplication_worksheets_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/zazowudegiwidubuxod.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/wewojavukoniwomub.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/57077121767.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2752/files/intravenous_urography_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0440/3593/2310/files/mevesumotarufu.pdf
    • https://cdn.shopify.com/s/files/1/0445/7755/4591/files/java_6_programming_black_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_34a53e6731434b94839cb6f70f13044a.pdf
    • https://static.usrfiles.com/ugd/a2e20a_231200942e1543d28a826e1838844285.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b8e.bin
c5df4f594e33c1e4f0f4faf85ff121fdac7cb17a1d6aafbaa77331d326c4a769
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8E 5408 bytes
font_01_sfnt_off00007dc0.bin
04d9c148ece0204b28c4e2fe793cda8ef760796afb3709f1020915d4c981c954
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC0 10376 bytes