Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7a55e45a0211a6…

MALICIOUS

PDF

52.9 KB Created: 2020-08-18 21:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6f4d80630ba73c8d8ccfd079a1176543 SHA-1: 7765db861b49b3ac24b7e1c5c967c3956813367f SHA-256: bf7a55e45a0211a60e01d92c7501704a22673f2fc3ecf601d316980acb82620d
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=android+vs+ios+market+share+global'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on cdn.shopify.com and other unknown domains. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary intent is to direct users to potentially malicious content or phishing sites.

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.ru/pify?keyword=android+vs+ios+market+share+global In PDF document text
    • http://files.taejulee.com/uploads/1/3/1/8/131872054/peguforafu.pdfIn PDF document text
    • http://files.bookscapes.co.uk/uploads/1/3/1/0/131069863/jerujenoxivenipu.pdfIn PDF document text
    • http://files.olgasplaces.com/uploads/1/3/0/7/130775163/2afeaa1a897.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/1/0431/6826/8448/files/computer_networking_mcq_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/dizexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4693/6482/files/53528143612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/applications_letter_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/cvc_word_family_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/xubarijemexidikatib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/89311218108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/6255619870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5603/7016/files/715782424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/conjuntivite_bacteriana_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/pidusidamejujakod.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
🗂 Part of campaign: olgasplaces.com 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8435 5280 bytes
SHA-256: a5f94b8a8bfac0911ed16cc195ff0cb0abf9d5a9a1561c0969cd07caa71cd1d8
font_01_sfnt_off000095fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95FD 10136 bytes
SHA-256: 0a5c0664e0b0f4d0d4c730cd5235aae8ea6d1bba7af45a76c44ccfe88df20b5e
font_02_sfnt_off0000b87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB87B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176