Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ad93642f21453a…

MALICIOUS

PDF

39.6 KB Created: 2020-10-22 23:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 06ef49641d29b542ca4e440ec2c2a93a SHA-1: 96264992e5d1f98fea9fb282619d34affaf292a1 SHA-256: e5ad93642f21453a8d8663e3c44ebe8db9132e202b6e06499fe73be3c563fa9f
194 Risk Score

Malware Insights

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

The PDF contains a deceptive title and numerous links designed to appear as a manual, but it redirects to a known malicious URL. The presence of many external PDF links suggests a link farm or SEO manipulation tactic to drive traffic to malicious sites. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

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://gettraff.ru/123?keyword=2020+mercedes+gle+350+owners+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5f887d65da72d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8de53226095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f91047e4d448.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wixanarer/the_name_above_all_names.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/digestion_y_absorcion_de_los_lipidos.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/futatexenuniwefubivuzipin.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/scert_books_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d43999c-df9c-4f4c-ad7a-d3b2a9b4279c/arma_3_bobcat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae68f2a5-c13f-403c-82cc-5b3ffa4820ff/hall_of_fame_piano_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef45374-44f5-43f0-8709-60414188883b/45311981116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d76c66c-fbc8-4636-9197-c9efc65ae176/90311385059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2933/0585/files/android_button_clickable_false_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/audi_a4_allroad_2020_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9038/5823/files/supplements_direct_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5437/2261/files/65007583407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9510/6754/files/dexuzerokifuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5106/5242/files/99780764453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0036/4693/files/huis_clos_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/elemental_shaman_guide_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/92544801480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/organic_chemistry_quiz.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_off00005810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5810 5820 bytes
SHA-256: 5952ec7d03131dbf20498b56a90dec249761ee0199f41c0b11e431513230e504
font_01_sfnt_off00006bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC5 10280 bytes
SHA-256: ec650c32ddc2f02c43c571ea159855129c5bd9b4535ffffcb0f1247d7b8cb0fb