Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a2143a82d85ab2…

MALICIOUS

PDF

119.4 KB Created: 2020-07-18 16:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 58460b8eb91de798774c4a57a5629f40 SHA-1: 7f594aaa922790c019eec24537f05a750c7485f7 SHA-256: 48a2143a82d85ab2364595fd6e44b8aea483403627d3b73587247086496d4482
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, which redirect to external resources. One critical heuristic indicates a direct link to a known malicious redirector infrastructure. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its intended lure, but the presence of numerous links strongly suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=espiritualidad%20cristiana%20catolica%20pdf In PDF document text
    • http://files.eguastella.com/uploads/1/3/1/8/131871690/4656610.pdfIn PDF document text
    • http://files.dirt-sailing.com/uploads/1/3/2/6/132682335/1489664.pdfIn PDF document text
    • http://files.whiteoakplantationbr.com/uploads/1/3/0/7/130775055/pejawabipo.pdfIn PDF document text
    • http://files.graziano3d.com/uploads/1/3/1/4/131409794/f9fe0b7a5ce.pdfIn PDF document text
    • http://files.bradswoodworking.com/uploads/1/3/0/7/130739247/wakinilakukigifugas.pdfIn PDF document text
    • http://files.cloakanddaggerdc.com/uploads/1/3/1/4/131410234/7d300.pdfIn PDF document text
    • http://files.grantsboronc.com/uploads/1/3/0/7/130776826/bfbdb3a2bd855.pdfIn PDF document text
    • http://files.adventuresofangela.com/uploads/1/3/2/6/132680852/4643649.pdfIn PDF document text
    • http://files.wichitafalls99s.com/uploads/1/3/2/3/132303219/4074751.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vimenemuzez.files.wordpress.com/2020/07/musimenofiwapakigoz.pdfIn PDF document text
    • https://wenajaxapat.files.wordpress.com/2020/07/fetewevudanafejatorokejaj.pdfIn PDF document text
    • https://reponeliz.files.wordpress.com/2020/07/75510826313.pdfIn PDF document text
    • https://xulugotar.files.wordpress.com/2020/06/lebasabibufemebabilod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/59920224293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/jopaxikosadovezenev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7014/4158/files/84862328747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6513/files/54708059606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/vurabim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C30 4872 bytes
SHA-256: 62a2edca292dc1500ac60ee980aa5807bcc19ce56bc46f5222e5e410b5e37b16
font_01_sfnt_off0001acb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACB9 10152 bytes
SHA-256: 88a79804363af5169560b10bf592558759f5b347d7ad7f0a2732f7047635550a