Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d1a871483a5e29…

MALICIOUS

PDF

51.2 KB Created: 2020-09-06 13:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef4478747ee75e1304bf3e00959114ff SHA-1: 1fd7b09732e85f4ef8ffd63af2729f62ff475fab SHA-256: 26d1a871483a5e2988f059d974786f85a4c4e0e6ec6674a9097f180f7a54c938
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, 'https://ttraff.me/pify?keyword=universal+audio+apollo+x6+manual', is the primary indicator of compromise, likely serving as a lure for further malicious activity.

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.me/pify?keyword=universal+audio+apollo+x6+manual
    • https://static.usrfiles.com/ugd/b8c837_928835d81da640d2afcb212bfb9f4c2a.pdf
    • https://static.usrfiles.com/ugd/34e21e_1af25c7189b2467e8c16105b0c20634c.pdf
    • https://static.usrfiles.com/ugd/0e6328_95c87d2026f2486799340cc9d07bd9ec.pdf
    • https://static.usrfiles.com/ugd/ce14f3_dffcd9892a8440338922897d86fb372b.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/11229547243.pdf
    • https://cdn.shopify.com/s/files/1/0432/3963/7155/files/kujirogipi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/metal_bending_machine.pdf
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/17844871456.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/ieyenews_word_search_math_terms_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/82778206030.pdf
    • https://cdn.shopify.com/s/files/1/0460/1954/3199/files/vomasizubiduk.pdf
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/cancer_de_estomago_etiologia.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_off000089b0.bin
c36ced464307423e2f56c98a8096a9711a91c290130d4cc30d555cabc9b0aebd
pdf-font-stream PDF embedded font (sfnt) at offset 0x89B0 5380 bytes
font_01_sfnt_off00009bee.bin
66d4dd79d9c323385a7d9d3c8c19d74bba00f3f187bd6951484fba5924a7ef78
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEE 10644 bytes