Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d40f8c4399f9ed8…

MALICIOUS

PDF

36.8 KB Created: 2020-08-23 17:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9e661ac7f6dc64b7839356b737c686b8 SHA-1: b3a4b84df7b46796e4b2bcaaebcbae7bc76f719b SHA-256: 7d40f8c4399f9ed84332666507d57243330c3fb116694be2943e9cd1274c5d01
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.com/pify?keyword=cross+linked+polymer+lab+report In PDF document text
    • http://lomiwe.matteroftimetoronto.com/uploads/1/3/0/8/130814106/870929.pdfIn PDF document text
    • http://jibivos.carpetcleaningstpete.com/uploads/1/3/0/7/130738948/zikuvunowimabafasor.pdfIn PDF document text
    • http://runiwugu.cambridgegirlschoir.com/uploads/1/3/1/4/131438563/289e46c2cc43ea.pdfIn PDF document text
    • http://files.psweloveu.com/uploads/1/3/0/7/130740053/mavisefoninaduleloxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/mathematics_textbook_for_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34993807018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/greatest_common_factor_and_least_common_multiple_word_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3778/6266/files/unseen_academicals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/human_physiology_by_ak_jain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/functional_training_handbook_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/liberty_tree_radio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/12844472502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/thomas_calculus_early_transcendentals_14th_edition_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9747/1656/files/29943360035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/55947773298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/classification_of_alcoholic_beverages.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46DE 5224 bytes
SHA-256: 2b9c15750b4af429d9e79e2a422930dd6020f6d964f98da108e160bec6fd5c64
font_01_sfnt_off00005885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5885 9168 bytes
SHA-256: 4d1e72aa89a2d7306187bd773fd1f1ecf35b3397b46ec95aa9703677a565979f
font_02_sfnt_off000077ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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