Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d776532282ffa37…

MALICIOUS

PDF

56.8 KB Created: 2020-08-12 08:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 624ce128d5e6137654e0ca0c3638be0e SHA-1: c76b991de6623ca3761eda9ac1bd56484923d264 SHA-256: 6d776532282ffa37f77cb67b8da0fd9d7312d5eb59728967e18a0c56f756c3bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one prominent URL leading to a known malicious redirector. The document body, though heavily obfuscated, also contains this malicious URL, suggesting an attempt to direct users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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=jurnal+cawan+petri+pdf
    • http://files.dechineselincs.com/uploads/1/3/0/7/130740625/5314133.pdf
    • http://dipozodop.mlkcelebrationcommittee.com/uploads/1/3/0/7/130738848/pibijo.pdf
    • http://files.cedarvalleyangels.org/uploads/1/3/1/3/131381881/741f6950.pdf
    • http://files.gospelquebec.com/uploads/1/3/1/4/131408942/nigevezud-rixomusurir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/b_pharmacy_question_papers_pune_university.pdf
    • https://cdn.shopify.com/s/files/1/0438/5590/4918/files/lapejezesemamorasanagupug.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/saints_row_2_money_cheat_xbox_360.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/gotunema.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/paper_chromatography_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/6675876252.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/povomopev.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/8392578260.pdf
    • https://cdn.shopify.com/s/files/1/0438/4299/4336/files/we_are_young._mp3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/cal_poly_san_luis_obispo_map.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1b2.bin
b032e5a8b788ea7d1c7c39157a21703bc506f11098e9dac01871804631ff49e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B2 5052 bytes
font_01_sfnt_off0000b302.bin
270d83452785896d6e8d4bfae0104171c1d53dc629c3578eca84d9016e28de4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB302 10324 bytes