Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4844ec9df07ff1…

MALICIOUS

PDF

48.2 KB Created: 2020-08-08 20:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5aa968898788fb5077a7a0b13e7fba2c SHA-1: 647f09ce2f1fe8d520b049eb5e012ca59de2149d SHA-256: 5f4844ec9df07ff1120c46dec859369aa7b4b3f6b6408690d6dec245a889cc78
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a primary redirector URL identified as malicious. The document body text, though heavily obfuscated, suggests a lure related to 'maternity leave form for teachers pdf'. The presence of a link farm and redirector infrastructure indicates a phishing or scam attempt designed to lead users to malicious content.

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=maternity+leave+form+for+teachers+pdf In PDF document text
    • http://zuxizutow.valleyalternativehealing.com/uploads/1/3/1/4/131407263/247433.pdfIn PDF document text
    • http://files.psichicpp.com/uploads/1/3/1/8/131871585/vinazuxuje.pdfIn PDF document text
    • http://files.andaveycrea.com/uploads/1/3/0/9/130969389/pulogile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/lizatujebefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/85282101865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/faneburozusexipuvunafega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/37052489364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woziki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/xogegeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5223/5938/files/tekuwudakanitetob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/jakozof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/lokufudejubuzujufowefek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/12674505341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/37994997162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/vaxivosisinabuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.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: psichicpp.com 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 5564 bytes
SHA-256: 4b21ca6a6f60e1dd148b1d345355a9b629edb198e82f20bcccfd580a51271c43
font_01_sfnt_off0000760c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760C 9916 bytes
SHA-256: dcf441d3023b3b9eda6f43b1fa580eefacac6e1caa31393eeb910729df67bffe
font_02_sfnt_off0000981f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x981F 8008 bytes
SHA-256: ce3b4bc0ec0937bb5de983369fbc765f557d14d302a9d517e284aeda5d97d020