Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66b5bf06026114e…

MALICIOUS

PDF

63.8 KB Created: 2020-08-14 01:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2180fa626411b99660ac4bd56e702add SHA-1: 321cb9192bcb66653b9ae1dd5b15adbe8d32adf9 SHA-256: a66b5bf06026114e104716b288d72f16b8a640983564e04defe45f1c3b8bf319
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, and another noted a link farm structure. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure, directing users to a redirector. The primary attack pattern involves social engineering through a seemingly innocuous document title to drive traffic to malicious sites.

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=math+brain+teasers+worksheets+pdf
    • http://romaj.jandbmkt.com/uploads/1/3/1/8/131856772/97f6bb7.pdf
    • http://files.sangproductions.com/uploads/1/3/1/1/131163898/03f8fa.pdf
    • http://files.markdebow.com/uploads/1/3/0/8/130813025/bonifuwa.pdf
    • http://files.bemedialiterate.com/uploads/1/3/0/9/130969310/jugudaxezubas.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1562/files/short_term_causes_of_ww1.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/92952816226.pdf
    • https://cdn.shopify.com/s/files/1/0434/4522/3591/files/91381580098.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/31979727585.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/gawagudoferan.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/73857574473.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/media_nutrient_agar_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0431/6810/4610/files/zososativogivewij.pdf
    • https://cdn.shopify.com/s/files/1/0432/0457/5387/files/21891919551.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/lanida.pdf
    • https://cdn.shopify.com/s/files/1/0448/9995/8939/files/vb._net_string_encoding.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/1_night_in_china.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/2738072479.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/blouse_cutting_method_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0487/0305/files/converting_between_analogue_and_digital_time_worksheets.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b599.bin
2316fe06ab6a02a35f66011b508cd75775cae8e8f420bc5e2a2308901a8f0648		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB599 5400 bytes
font_01_sfnt_off0000c800.bin
567aec36ffd0f71fbc04a252a27614d2a69593d654a380601ce70c6c8cb700fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC800 13196 bytes

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