Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62e112928711725…

MALICIOUS

PDF

49.5 KB Created: 2020-08-26 05:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 65cffbc5f04ad75deab88dbdd61005c8 SHA-1: 0b04b6635fb40360acc52d6e9ddf452db7d2e4b0 SHA-256: a62e11292871172515bd76d4b16c7cd5807c71d29e12fae5fb454d79a7aa8704
202 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to downloading an 'alfa rtl8187 wireless driver' and includes the malicious URL. This suggests the document's primary purpose is to trick users into clicking the link, which then redirects them to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=alfa+rtl8187+wireless+driver+download+windows+7 In PDF document text
    • http://vasum.destinationtravelco.com/uploads/1/3/1/4/131406436/118be959.pdfIn PDF document text
    • http://kujesu.allisonpharris.com/uploads/1/3/1/6/131606617/lozonazonolaganasa.pdfIn PDF document text
    • http://files.watertownmeatcenter.org/uploads/1/3/1/8/131871980/zelil.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/1/0433/0687/7080/files/sikotifukiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/nutritional_benefit_of_breadfruit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7077/4677/files/1601018557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3319/0823/files/lotugop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/simple_future_tense_worksheet_for_class_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/mibadubilij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/32298988243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7668/0869/files/sebulozanitelaloxifikeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/molokajerirorurinena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4997/5959/files/63731996189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/gelesabeguxudujof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5165/5076/files/surilodimibid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/tupudozesunujo.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_off00007674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7674 5368 bytes
SHA-256: b93e122fce1fdcbe164112fcb09726a7e7ee5ddc803756ccec0b7aa5cef80f90
font_01_sfnt_off000088e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E3 15536 bytes
SHA-256: 49feb5223ee38442d6ee28df201ac545987a0b7b03fc9c8e2083c172ec2771c3