Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc146f6e23f9ca0…

MALICIOUS

PDF

41.6 KB Created: 2020-10-06 20:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 548844083d1bc380d7e6f3b8f526d33e SHA-1: dd4c09ffc340029f92c26226bd387504ea3d66c2 SHA-256: bfc146f6e23f9ca0978fd99bac91a538ab4d5a84def8841bfb1305c79e499454
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.club/pify?keyword=ios+launcher+mod+apk+download In PDF document text
    • http://jukakus.palacecityjazz.com/uploads/1/3/1/0/131070289/d396e998df58c.pdfIn PDF document text
    • http://files.gilfordvillagenurseryschool.com/uploads/1/3/1/4/131437198/c4d06cac7.pdfIn PDF document text
    • https://site-1039833.mozfiles.com/files/1039833/vusegumalogapeto.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/gemujob.pdfIn PDF document text
    • https://site-1043669.mozfiles.com/files/1043669/13324701021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8196/9063/files/diggys_adventure_lsung_tiger_woods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/vobakokifukinofiwalovijaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8564/4454/files/conservation_officer_jobs_colorado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4914/7816/files/nogoxom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8062/8889/files/seussical_the_musical_jojo_songs_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6015/2488/files/sonurokixegikabubunuzije.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_off00005b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6B 5404 bytes
SHA-256: 34b6bf846f6f153007790ea15e52ed945f2f704aa6ab79d2dcc5b3d044f19aa9
font_01_sfnt_off00006daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 14172 bytes
SHA-256: 16289615d3ca09761e6155bee278998e1db36f1866904f10cae11463b4ae609d