Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf81fe2d51e100b…

MALICIOUS

PDF

51.1 KB Created: 2020-08-14 07:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ffe7f466b31c5bfa672736529bad459 SHA-1: 83f9e765f63898c8301d456054cd68f2ff04d950 SHA-256: ecf81fe2d51e100b0aab5f6ef6c2be93503b66f5beb3db97b7fb27f0222e41df
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.cc/pify?keyword=pfms+meaning+and+full+form, which is likely part of a phishing or scam campaign. The document body, though partially corrupted, contains the same lure text and the malicious URL, reinforcing the attack pattern.

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=pfms+meaning+and+full+form In PDF document text
    • http://rorarufu.rosariomedicalfoundation.com/uploads/1/3/0/8/130814017/5467806.pdfIn PDF document text
    • http://files.dfwbash.com/uploads/1/3/0/9/130969184/wajurapileki_fujanarem_tonurule.pdfIn PDF document text
    • http://files.portlandcoyote.com/uploads/1/3/0/9/130969036/b4414162bef4ec.pdfIn PDF document text
    • http://files.oldsheriffshouse.org/uploads/1/3/1/0/131070207/2295660.pdfIn PDF document text
    • http://kedafasi.capetipseafood.com/uploads/1/3/1/4/131453902/vivirusejevena.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/1/0431/4379/0760/files/73171812924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0033/8331/files/64846012392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2946/7036/files/93421509882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/79776150519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/13176544072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5386/7427/files/luwajanenapog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8913/9614/files/tutorial_on_python_programming_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/bescherelle_chronologie_de_l_histoire_de_france.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/kulezoreneguvevuredavod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/honda_v65_magna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/wajenakesapevosulogad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/zarakulapunewawal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/ic_723_voltage_regulator_datasheet.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_off00007ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CED 5032 bytes
SHA-256: 3252573eaf1eb71cfa1ab1b5bcf4a9f0bf623103e23a8401fbff22f2fa554dfa
font_01_sfnt_off00008dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD9 10364 bytes
SHA-256: c76378465adaed2a58f845a1339fc3569b2d66e4457c39ccee76cc417105c73d
font_02_sfnt_off0000b150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB150 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333