Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71241446ab27597…

MALICIOUS

PDF

71.7 KB Created: 2020-08-07 14:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2497c75f7c5ddb2929ec85ac5f9529c SHA-1: e8e05d01072d0edcc7d0d582ce0e65db7a10245d SHA-256: d71241446ab27597d6cce1070f9d287d990835bd9979d0a4e81e5a4819aa4924
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external content. The presence of a large number of external PDF links, many pointing to Shopify domains, further indicates a link farm or content stuffing technique to mask the malicious redirector. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=flow+cytometry+principles+and+clinical+applications+in+hematology+pdf
    • http://files.smileygloss.com/uploads/1/3/1/0/131069910/fabijulipikopa_suvoperemim_pamavufupebi_xodijidif.pdf
    • http://sefipuzaw.simplifiedbybobbie.com/uploads/1/3/0/7/130740596/828baa2.pdf
    • http://files.openarmsbanduk.com/uploads/1/3/1/6/131637226/5304286.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/bohemian_rhapsody_piano_solo_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/69205466064.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6039/files/xobugupazuvenebituzava.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0652/files/schneider_mcb_c60h_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/razikeruranofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/tolumobof.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/99173233018.pdf
    • https://cdn.shopify.com/s/files/1/0430/7527/2855/files/losolutif.pdf
    • https://cdn.shopify.com/s/files/1/0439/0780/9448/files/xulotupemibepunelidebura.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/80967611492.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4654/files/25092439317.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/mamitotizizefagetodu.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_off0000c5cc.bin
0a12b0ecbeb852205d87f6e074211246a6a8459e689ab8a299485441d5d1db5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CC 5716 bytes
font_01_sfnt_off0000d933.bin
395dd913dbf9a0adcede528e52c971e415546aa0ce52270ca0f68acce7c0c2b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD933 9908 bytes
font_02_sfnt_off0000fb48.bin
49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB48 16148 bytes

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