Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b519ce82ab8262d…

MALICIOUS

PDF

34.7 KB Created: 2020-08-20 22:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea85fa6254a8f0143dc341dde812e994 SHA-1: 1f6a4a77eb3862243e5ca3414b11c868cf767086 SHA-256: 8b519ce82ab8262d6cc7083244cd47fb206d8984985932d5f7968d7dd86c7704
154 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=fidelis+care+essential+plan+income+guidelines+2019', which is a strong indicator of a phishing or malware distribution attempt. The document body, though partially corrupted, includes the same lure text and URLs, reinforcing the malicious intent. The presence of numerous external PDF links, many hosted on shopify.com, suggests a link farm designed to obscure the ultimate destination or to appear as legitimate 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.com/pify?keyword=fidelis+care+essential+plan+income+guidelines+2019
    • http://files.ctforkids.com/uploads/1/3/1/8/131856353/7f9af85b2bcd.pdf
    • http://kawipinuv.earringstolove.com/uploads/1/3/1/3/131398157/suxonebu_fagum.pdf
    • https://cdn.shopify.com/s/files/1/0448/3753/5906/files/12008039792.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/accounting_theory_and_practice_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/bpsc_assistant_mains_question_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/kupixora.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3176/files/89490439347.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/67014577319.pdf
    • https://cdn.shopify.com/s/files/1/0447/6128/4757/files/88527767954.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/dokofu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/metric_conversion_word_problems_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8344/7966/files/antonio_vivaldi_spring.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/wipasipikalufidotubutu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/geometric_mean_statistics.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_off00004848.bin
c544ccd6c4442f47d9200d4870469edb70780c6ab86bf36f5c391de737665fd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4848 5828 bytes
font_01_sfnt_off00005c04.bin
af2c9af4647ce866be87fd4da5f8554b6668bd2816671c5f63b98b02cb74f1c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C04 9976 bytes