Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc4e5bb6a5c42b9…

MALICIOUS

PDF

53.6 KB Created: 2020-08-12 16:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea30fbc6a25eb1d8345705dd0343dda SHA-1: b948ae4ae4d441d26c3bfdc0819ab29f629d15e5 SHA-256: 8dc4e5bb6a5c42b922628b8a7a52bce4d3bb595139a6bdb2cb3f5f952756c2e3
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs. One URL, 'https://ttraff.com/pify?keyword=problem+solving+skills+pdf', is identified as a malicious redirector. The presence of a large number of links, many pointing to Shopify domains, suggests an attempt to manipulate search engine results or distribute malicious content through a seemingly legitimate platform.

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=problem+solving+skills+pdf
    • http://poxapewe.culebrasailingcharters.com/uploads/1/3/1/3/131383297/titivokiladog-gipojodiwipilel.pdf
    • http://files.ohmylashuk.co.uk/uploads/1/3/1/4/131452750/605191c5a7da.pdf
    • http://files.innovativearts.com/uploads/1/3/0/7/130775021/demuzebesanef-jepip.pdf
    • http://files.healingabundantly.com/uploads/1/3/1/8/131857120/5c56133.pdf
    • http://rerivisul.jenniferpolo.com/uploads/1/3/1/6/131637814/5504172.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/61068391646.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/testicular_torsion_management.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16946396068.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1416/files/angielski_czasy_zestawienie.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/math_symbols_chart.pdf
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/kopatejasotujoxuverudo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0982/7231/files/81165589786.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/jejemisanamijizadamiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/lexibapilejezis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/66648595263.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/12190088287.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087e5.bin
a0c75994b0528e4bacd0d56cc401ed58c35e4abbbd19e6680cc2d8d798671155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E5 5124 bytes
font_01_sfnt_off0000992c.bin
4749a0bc9f212abb779e0dea3b8b4d22a394ff45d04bedda76c0690cc1dc5a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x992C 10036 bytes
font_02_sfnt_off0000bb73.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB73 4324 bytes

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