Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea28ebbe27be54ef…

MALICIOUS

PDF

45.9 KB Created: 2020-08-22 09:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f61017538fd67b2d421259fdd217054d SHA-1: 4d2e7702d23e76387345103ad140d183e4e11983 SHA-256: ea28ebbe27be54ef0a7c92138bac35574aafe9f37016c5685ebe4941a9bb46ee
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search engine results, specifically for '2019 video editor app for android'. The primary malicious link, https://ttraff.cc/pify?keyword=2019+video+editor+app++for+android, is a known redirector. The document body itself is heavily obfuscated but contains this malicious URL, indicating a phishing or redirection attempt.

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=2019+video+editor+app++for+android
    • http://peteji.svstealth.org/uploads/1/3/1/6/131637814/dixisi.pdf
    • https://cdn.shopify.com/s/files/1/0446/7677/6089/files/structural_reliability.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/28327667628.pdf
    • https://cdn.shopify.com/s/files/1/0447/2376/5402/files/agrarian_reform_law_by_ungos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/gatiwoxeveme.pdf
    • https://cdn.shopify.com/s/files/1/0460/1407/0945/files/mp4_movies_free_full_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/6262/3397/files/el_feudalismo_2o_eso.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/memifumijavibafavufexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/mcdonalds_printable_coupons_2016.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/34183504202.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_off00007672.bin
88e5e1569f4d7ef476cdce82a6809e4f5010e06b4cbf8ee143d14f84cbd9d534		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7672 5272 bytes
font_01_sfnt_off0000886f.bin
eea081abfec14f687e29a673f5805ae8c2c0d24f6724e23a79ab2418ef4062ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886F 10136 bytes

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