Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51543cc24ca06ec…

MALICIOUS

PDF

42.6 KB Created: 2020-08-11 20:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0d99dc8924364a74327f1665014df07 SHA-1: 3224df7f6de5a5de072308ecd9a06ab542a31f73 SHA-256: b51543cc24ca06ecc6e5e7f7fcfe8ddc84777464010d12b1f2753d9eb48ca657
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure related to AWS certification dumps, likely to lead users to a phishing or malware download site. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, which is a common tactic for SEO poisoning and distributing 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.com/pify?keyword=aws+certification+dumps+pdf+2020
    • http://files.morriscountypca.org/uploads/1/3/1/8/131856276/pitibepufevuba_zezisori.pdf
    • http://files.surprisescorpionsaz.com/uploads/1/3/1/8/131856068/42d566.pdf
    • http://files.nwnna.net/uploads/1/3/1/4/131438708/03ca84ef0fa.pdf
    • http://zezin.diluvioaz.com/uploads/1/3/1/6/131606349/7820785.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/bamina.pdf
    • https://cdn.shopify.com/s/files/1/0436/1519/1202/files/kosevimanurepawagojurim.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/46458996053.pdf
    • https://cdn.shopify.com/s/files/1/0428/9092/0099/files/gokisolomabixenusirina.pdf
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/usps_zone_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/contoh_soal_akuntansi_perusahaan_dagang.pdf
    • https://cdn.shopify.com/s/files/1/0437/6094/3258/files/maluzabirakebilokeba.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/24346864712.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/addiction_treatment_homework_planner_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/99239364255.pdf
    • https://cdn.shopify.com/s/files/1/0436/2023/7475/files/saint_petersburg_metro_map_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/catalogo_jequiti_08_2020.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_off000068dd.bin
7f46772ff8b1009b5e3330552f1887e4a7db46bb6709c63f2dcd4d4cf70ea330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DD 5624 bytes
font_01_sfnt_off00007bef.bin
53db5a2c9845579d0afb43d3c4ada513251f4926740d8efba226660afeace09b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEF 9840 bytes

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