Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcd6c6be99faba9…

MALICIOUS

PDF

43.1 KB Created: 2020-08-18 16:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc88f55746b0351cb9eed75a14f8decd SHA-1: ee5f0d9d3b3c9a7da77c7f7c8f25e9bebcf07f59 SHA-256: fbcd6c6be99faba94496d24c9707a94eb804183feef03d883ce49a4519f487ab
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The primary lure appears to be a PDF download, as indicated by the document body and the embedded URLs. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly suggests that clicking the embedded link will lead to 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=blindspot+hidden+biases+of+good+people+pdf
    • http://files.doublecreekfarm.net/uploads/1/3/0/9/130969656/gukemuxigim_jovobopufunero_jedugoluzavok_pubida.pdf
    • http://files.bestofthewestmoving.com/uploads/1/3/0/7/130776864/1905575.pdf
    • http://fokosewe.tiffanytucker.us/uploads/1/3/0/8/130874330/bafujemopufus_pejaxodabikugoj_zezakabuvekekaj.pdf
    • http://xudon.carolinabbqnewland.com/uploads/1/3/1/3/131398440/vubavuwipigas.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/xiwexufuto.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/wiravejabuliromifa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/badowiwozazizedukol.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/vabibakejojugezoti.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9567/files/grade_7_math_review_ontario.pdf
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/74927589996.pdf
    • https://cdn.shopify.com/s/files/1/0434/3139/5478/files/81254872555.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_off00006b72.bin
0a89471371302f53cd01ef948d56bfb88a1df0655c4efa7b88e777bbfd66e991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B72 5396 bytes
font_01_sfnt_off00007dc2.bin
cfd72c85c70f8487ea58e3c0cf3f95d59c3f6ca25c13db54dc86ede7666eafbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC2 9852 bytes

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