Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b2ab4516e290d3…

MALICIOUS

PDF

48.0 KB Created: 2020-07-29 18:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bbb7b0a9599a841112ef33e930868a61 SHA-1: 53f3c1438c7456cfe53fb4b58762cf0b9060ce04 SHA-256: f7b2ab4516e290d36057f51e119ab98ba4fdf62d4b984ad27f8b5182d6888260
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a theme related to 'Sbr sewage treatment plant pdf', likely a lure to disguise the malicious intent. The presence of a link farm and a critical heuristic firing for malicious redirectors strongly indicates a phishing or malware distribution attempt.

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=sbr+sewage+treatment+plant+pdf In PDF document text
    • http://files.parentlednetwork.org/uploads/1/3/1/3/131384098/wususuwasoxozi.pdfIn PDF document text
    • http://files.cardiffband.org/uploads/1/3/1/4/131407952/lejezu-jasides-jagajewi.pdfIn PDF document text
    • http://files.ronaprea.com/uploads/1/3/0/8/130813461/edc5e5cefd568c3.pdfIn PDF document text
    • http://files.dreevin.com/uploads/1/3/0/7/130738712/punenifetevo-titaxiwup-rinef-kadegodekazare.pdfIn PDF document text
    • http://files.leifrichardson.org/uploads/1/3/2/6/132681891/3536546.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/1/0432/7142/2102/files/rujidubudovoxita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7527/2855/files/pebabirimaraxuforusoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/jesig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7963/1001/files/murujojemewuviruwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3172/2146/files/76988157131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/ritazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77330784460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4678/8502/files/vadab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/62294715940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/kafimemajufulujotiven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/90743790965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/39321374427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/filipilezafug.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 7

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B93 5324 bytes
SHA-256: f0c4934a94e58fbc8e8464510bc01b40739f9e369bae3580c5e42faf3ff5ea53
font_01_sfnt_off00008d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D98 10364 bytes
SHA-256: 885a1ebae72afdc26896f61c02a9cfae5e39a8f15901119ecf009346d50a7321

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