Malicious PDF — malware analysis report

Static analysis result for SHA-256 c806745146022b06…

MALICIOUS

PDF

46.2 KB Created: 2020-08-18 15:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ced272e38c23eaf7872b43f578fe5125 SHA-1: 8ee157e3b0e43bfcceae3f7739cabc724be7243d SHA-256: c806745146022b068ebc0c955ed569acfa8513e3062e39e4d37b70cdd2c6b209
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=google+drive+2019+calendar+template'. This URL is embedded within the document body, disguised as a Google Drive calendar template. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly supports the malicious verdict.

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=google+drive+2019+calendar+template
    • http://files.pencillarium.com/uploads/1/3/0/7/130775728/6607115.pdf
    • http://files.learn-tarot.com/uploads/1/3/1/3/131380292/5b559b5dd6bd.pdf
    • http://files.westwoodchristianchurch.net/uploads/1/3/1/3/131383791/b735d9356a.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/91876160641.pdf
    • https://cdn.shopify.com/s/files/1/0433/8332/4822/files/gem_car_troubleshooting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/42586331506.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/govafataxop.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/marimarefexawibisinowop.pdf
    • https://cdn.shopify.com/s/files/1/0434/9136/0934/files/affairscloud_current_affairs_monthly_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/52967494373.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/96542291515.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/27571104472.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5084/files/fajeritofawofefumawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/41499136051.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/rulof.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_off0000755d.bin
6703dc99f06a33c864908f34fd53831ca2d5bfc4aaeab0a44eaeb51b6cb2857d
pdf-font-stream PDF embedded font (sfnt) at offset 0x755D 5788 bytes
font_01_sfnt_off00008908.bin
250665b24fa6ae9dfab7cb6d6e338ae880d429a36bd465ae311a88354ac06992
pdf-font-stream PDF embedded font (sfnt) at offset 0x8908 10240 bytes