Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c408b65e7539263…

MALICIOUS

PDF

58.6 KB Created: 2020-08-20 05:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81a27d39aebc79faa5f2ffac14fc5889 SHA-1: 334adbb299d3422d9f1b42e044998335a928c3c7 SHA-256: 1c408b65e7539263b16a942292e20f9731b230cd894843d820ed2578dfd73330
170 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Outlook automatically pictures gpo' and a call-to-action phrase, suggesting a lure to trick the user into clicking the malicious link. The presence of a link farm further indicates an attempt to manipulate search engine results or distribute malicious content.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=outlook+automatically++pictures+gpo In PDF document text
    • http://files.sharptravelplanners.com/uploads/1/3/1/4/131407761/pukovakabaz.pdfIn PDF document text
    • http://zinupud.ackertech.org/uploads/1/3/1/4/131406947/lukagokubokix-kotud-xubasefiteruz.pdfIn PDF document text
    • http://xupuxad.landlandland.com/uploads/1/3/0/7/130775126/tetikowo.pdfIn PDF document text
    • http://files.lynous.com/uploads/1/3/0/8/130814258/9912537.pdfIn PDF document text
    • http://beposilet.en.revesalpins.com/uploads/1/3/1/8/131856666/8789052.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/1/0434/2205/6600/files/gomujez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4063/5042/files/magic_item_compendium_3._5e_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/xivijabimejurenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7087/4009/files/rejepulit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/63716925120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/kinatudune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/tuwogonobosutimamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4103/3114/files/losuwujijukawapebubadebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mitev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/rurugamox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/sutanagexigus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/how_to_find_my_google_id.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/brunner_and_suddarth_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5011/3943/files/affirming_diversity_nieto.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC5 5448 bytes
SHA-256: b5b4b3ca8bde8d0ba1811e2ed03e0e697a243c899d84e9f156ca6941c0a8080e
font_01_sfnt_off0000a246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA246 10472 bytes
SHA-256: e0f047f5013808a385acabd05e169e31657e2741d975d5fb706d86038d9717c7
font_02_sfnt_off0000c64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64C 16088 bytes
SHA-256: 03928253ee2cb1fef248e02a9a6434000674c6c2dfc7f61f5290e699cd36adc1