Malicious PDF — malware analysis report

Static analysis result for SHA-256 880dec18cb7e1b62…

MALICIOUS

PDF

58.7 KB Created: 2020-08-09 17:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0781f74a6ec527dd3d9c766863052549 SHA-1: b08f0a5c22d97fd54e9636b1d0d647ae274ba6a5 SHA-256: 880dec18cb7e1b62dd9e1ef926af5ab50aec24bd885f6a9c84dbc6c01eec4779
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to a known malicious URL, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains the text 'House rent agreement pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links further supports the malicious intent of redirecting users to potentially harmful 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.ru/pify?keyword=house+rent+agreement+pdf
    • http://vuzonelav.myperformingarts.org/uploads/1/3/1/4/131482962/48355b0466ea.pdf
    • http://files.daleismopeners.com/uploads/1/3/0/7/130740440/f9c6f9a2c44.pdf
    • http://files.northcarolinapovertycoalition.org/uploads/1/3/0/8/130873893/1265822.pdf
    • http://rotuzipaw.hopeam.com/uploads/1/3/1/4/131437987/vijikug.pdf
    • http://files.lhstv.net/uploads/1/3/2/8/132814593/konosujomefi-jivuvixigajo-fifaxom.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/66730156833.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/89570635232.pdf
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/60047038883.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/cooling_tower_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0438/0511/4528/files/adagio_for_strings_arrangement.pdf
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/58942138051.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/jodimilerubefuzafimuzog.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/problem_solving_multiplication.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/pourquoi_se_brosser_les_dents.pdf
    • https://cdn.shopify.com/s/files/1/0429/1615/1455/files/pesinotomamufelewi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/gamaboxolewolutu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/pdf_splitter_merger_software_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98774508290.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_off0000a80a.bin
0a34a410a7adbeac55180a1895c9e3b01e70431253033264d9e21b4851377e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA80A 5292 bytes
font_01_sfnt_off0000b9f5.bin
76eac1fb12422821ac5d362cb0c2b54edbd56a92f0388c5ae4ada320cab77129		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F5 10456 bytes

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