Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb812a58076ccd26…

MALICIOUS

PDF

47.3 KB Created: 2020-08-22 23:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9acea61461fb7bf7d8e4f3b7de558147 SHA-1: df68e555c730392f015c62bba5e7a8c729b021d8 SHA-256: cb812a58076ccd26d7450d5c7d7b918c2c2affc1c10c68181704d3917af649e5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=directv+sports+guide+soccer', suggesting a lure to a malicious site. The presence of a link farm further indicates a malicious intent to distribute links to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=directv+sports+guide+soccer
    • http://files.lincolnvillage5.com/uploads/1/3/0/8/130874122/125d4852f6.pdf
    • http://files.heart2heartfs.org/uploads/1/3/0/7/130775245/toxujozukalezo.pdf
    • http://files.myturningpages.com/uploads/1/3/1/3/131383764/sover-bopimixaf-zetagowibowoto-pukagini.pdf
    • http://wegosi.verse-virtual.com/uploads/1/3/2/6/132683056/xududewaw_wisimobi.pdf
    • http://files.thehillcroft.co.uk/uploads/1/3/1/3/131383754/mexuk-sotijidiverevas-velakisugirine.pdf
    • https://cdn.shopify.com/s/files/1/0459/2726/8503/files/logo_game_answers_level_1_facebook.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/sports_vocabulary_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/49272086355.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/cash_flow_statement_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7015/1061/files/rurijiduxapepopepiwoxafos.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/95852606854.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/pabalefu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/sewinamajewusewuwux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7314/2933/files/38361188244.pdf
    • https://cdn.shopify.com/s/files/1/0429/4131/7276/files/91533872636.pdf
    • https://cdn.shopify.com/s/files/1/0448/2465/8082/files/sibuli.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/escherichia_coli_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/ben_10_tamil_episodes_isaidub.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_off00007b92.bin
43ff80d6195564da6b8e9d9b9e2549c12e0efd851857a13ad5a0b5f65446f3c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B92 5056 bytes
font_01_sfnt_off00008cdf.bin
456c3f289b61ed08e27ea7f8c78a622980a3c0753b0dfb4c5b9ea699cfed6e93
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDF 10352 bytes