Malicious PDF — malware analysis report

Static analysis result for SHA-256 6102cefb78be282b…

MALICIOUS

PDF

52.6 KB Created: 2020-08-12 22:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7afb712c8aae96b156df6929f9e584fe SHA-1: 2dd8fcbc51c19f12ff5241195c4d0eb680d723d4 SHA-256: 6102cefb78be282b2f41e65cdeb86b0feeaf78b303efcccf48300af2fc84d39b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that likely serve as lures to download further malicious content or redirect to phishing sites. The presence of embedded URLs and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirm the intent to lead users to harmful infrastructure.

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.com/pify?keyword=adverbials+of+time+and+place+pdf
    • http://fokuzetej.hk100-ultra.com/uploads/1/3/0/9/130969724/tuwapudab.pdf
    • http://ruwusija.parklandschool.org/uploads/1/3/2/6/132695535/pajuvokojalefa.pdf
    • http://lasedu.lifeconnectioncenter.org/uploads/1/3/0/9/130969754/39105.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/affine_geometry_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/74016101347.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/65457578809.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/basawefojubigagogerito.pdf
    • https://cdn.shopify.com/s/files/1/0438/1779/5741/files/automatic_control_systems_10th_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/41583564013.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7578/files/anomalistic_psychology_a_study_of_magical_thinking.pdf
    • https://cdn.shopify.com/s/files/1/0447/2979/4713/files/hygiene_hypothesis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/jixaxowelemog.pdf
    • https://cdn.shopify.com/s/files/1/0431/1118/6588/files/gst_certificate_sample.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000099d5.bin
87ac389f16d2b66280b5559453fa433a55414d7d7460d8bf63517a9c2068838d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x99D5 23644 bytes
font_00_sfnt_off0000644a.bin
9bc01fe967df08aa464361c09550c1b6438d18747ae103d93f0e37ecb0f6d730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644A 5488 bytes
font_01_sfnt_off000076d8.bin
65e722a1078d065165692ce5b9e284c5fdd4688222f7ec2477a5d5d8347e39de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D8 10224 bytes

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