Malicious PDF — malware analysis report

Static analysis result for SHA-256 a39f12800e24e2ba…

MALICIOUS

PDF

43.2 KB Created: 2020-10-25 08:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 7aef8033f095d28cdae69cfbffbae039 SHA-1: cb30a8647094db2a13f7a9b666c9b96ae3075b6a SHA-256: a39f12800e24e2ba51e37e7121cbd2212f76b6636ba04f50175a1a6fd23d90a9
194 Risk Score

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.me/aws?keyword=corporations+act+qld+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5f93dfb7eeb20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f8d638c949be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f93ce3c41179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f93f6834d33c.pdfIn PDF document text
    • https://loponulofaxoli.weebly.com/uploads/1/3/4/3/134324484/burodakometuf-votubumemedet.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/03743.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f872f0159e09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_5f8da40c4105b.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006aa6.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006aa6.bin)
    • https://uploads.strikinglycdn.com/files/e32c1c4e-72cb-4cea-bc11-d41cc72e50a2/31517454599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3439/4276/files/tulirekelezofuxaxidomugir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9982/2520/files/written_in_red_anne_bishop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9294/4058/files/machine_operator_resume_no_experience.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7142/5697/files/66873232331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6174/7105/files/verafixuxogelesob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/4524145896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5510/3138/files/82308865624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/5254/9532/files/woxujogebefen.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 extracted file (font_00_sfnt_off00006aa6.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA6 5180 bytes
SHA-256: b19263da8e510fc03677851aed5d79a6b16df6f2f0641dd91d29dc7a89e19653
font_01_sfnt_off00007c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4C 10336 bytes
SHA-256: da44bd9b8aead10ead6b0846d3765423613024ffb3625e1d0a91e2b911631232