Malicious PDF — malware analysis report

Static analysis result for SHA-256 852318367ef049ae…

MALICIOUS

PDF

43.0 KB Created: 2020-08-25 06:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3f1c612ea77898142a64ca409ca9b16 SHA-1: 9c47b3ad14a52e46629460e03a007132b96e798f SHA-256: 852318367ef049ae4756d3eea23b4c6cca5dd819b9d35b0ff7d0752832102f90
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised with text related to Accenture technical support. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the embedded URL in the document body strongly indicate a phishing attempt. The ML classifier also flagged this PDF with high confidence. The presence of numerous external links, including those hosted on Shopify, suggests a link farm designed to distribute malicious content.

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=accenture+technical+support+interview+questions+and+answers
    • http://files.cristinamiguel.com/uploads/1/3/1/3/131380297/7c6ce.pdf
    • http://jemoxed.familyreunionsaustralia.com/uploads/1/3/0/7/130776349/84379ffa1.pdf
    • http://xivovum.triplecrownlacrosse.com/uploads/1/3/1/4/131453558/detax.pdf
    • http://files.barrycolonfitnessrus.org/uploads/1/3/0/7/130740069/de936683814.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/gafuvijoxaramaza.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/fluxion_5._6_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/53421532071.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/baberupawafez.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/xuvewolawelago.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12909571685.pdf
    • https://cdn.shopify.com/s/files/1/0438/3817/7430/files/99576004561.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5030/files/danodejabapurilaramibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/kezoto.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/abdul_hameed_adam_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/concatenate_linux.pdf
    • https://cdn.shopify.com/s/files/1/0460/3910/5700/files/chenani_nashri_tunnelway_limited_annual_report.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_off00006926.bin
86cbb3e976269b33146288fda8c22f9b9f1ad4915af35cc87b77a53b5291a82a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6926 5428 bytes
font_01_sfnt_off00007b97.bin
945d7a8c1e88378295995d90b3e93f444a5c54835b088ab44fcdc067008f810a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B97 10284 bytes