Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b01ffa63a159c9…

MALICIOUS

PDF

44.8 KB Created: 2020-08-19 05:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 56404eaec30dde439ddcd0c9bfe0d51e SHA-1: e8a427ade813de1ef88526dd9b4a9c5988d50ed7 SHA-256: b1b01ffa63a159c9be8bbd2ca90eca5aabc37b2d82e0cccac98c7afca7224678
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector service, disguised as interview preparation material. The redirector URL is https://ttraff.cc/pify?keyword=answering+interview+questions+format. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=answering+interview+questions+format In PDF document text
    • http://files.karereviews.net/uploads/1/3/1/3/131379833/447298c31cee.pdfIn PDF document text
    • http://files.islammuslimcyprus.com/uploads/1/3/1/3/131383619/zewalaregojamen.pdfIn PDF document text
    • http://sufepob.lakesideschnauzers.com/uploads/1/3/1/6/131637047/wadizorusunovim-xenimefosita-jotozere-salifixowapuso.pdfIn PDF document text
    • http://files.corderovasquezlab.com/uploads/1/3/0/7/130739835/xasapo.pdfIn PDF document text
    • http://zakavu.kevincardiffcollection.com/uploads/1/3/1/4/131409090/1549452.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/1/0431/2891/4074/files/brastemp_inverse_max_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4449/3720/files/medical_examination_form_for_canada_immigration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/gilosolipurof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/1635/6757/files/3726447623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/mit_license_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4469/9288/files/free_zoology_books_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2648/0295/files/designing_data_intensive_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taniseraguvifololesugom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/85663701917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/mexodoru.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646C 3304 bytes
SHA-256: 0eee0c717c3fd98372df3d2c2f281b74e80190b34768fce79aa1701b8120bcef
font_01_sfnt_off00007052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7052 5320 bytes
SHA-256: d3d8942dca2acbacb4c5e1538f4bfb5a42eb5504ab2e3f3e5a1f9cf48511e984
font_02_sfnt_off00008266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8266 10224 bytes
SHA-256: 96cc4799eaf59c4feae130efce19a47260e10c6ef20ef434b7cade1472f46ca4

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