Malicious PDF — malware analysis report

Static analysis result for SHA-256 efdb4d0c5460c7a0…

MALICIOUS

PDF

57.0 KB Created: 2020-07-23 14:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: babdc88afe2074df48d5a1deddfa2219 SHA-1: fe98ecd92e5a0af71d0f58f6d4fbb8bffed2bf9f SHA-256: efdb4d0c5460c7a0a4d39fd5243ff5e174b76d5dcaf15ae95da78251c518ea43
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'Maslow theory human motivation pdf', suggesting a lure. The primary IOC is the malicious redirector URL.

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.com/wb?keyword=maslow%20theory%20human%20motivation%20pdf In PDF document text
    • http://files.ibbyireland.com/uploads/1/3/1/4/131408024/8475841.pdfIn PDF document text
    • http://files.protegeedu.com/uploads/1/3/1/3/131379246/pitufubalovojojebato.pdfIn PDF document text
    • http://files.thesensualist.org/uploads/1/3/0/8/130814254/wuwotuw_fatitope_bogasokuriv.pdfIn PDF document text
    • http://files.tweetyssweeties.com/uploads/1/3/0/7/130775893/bavavigorarejin.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/1/0428/2017/3983/files/89008086601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/87496096307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/nepitelidul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/monogekabixelejilenoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sibubemazalomasedexikeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6296/5912/files/xegorenefikeporivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/81940744847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/95415106976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9807/8372/files/zujotiwebarozadiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/50084414452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2828/1506/files/vasare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/budolimumatifozavagaviket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7455/9893/files/lipum.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA03E 5420 bytes
SHA-256: f44fa8c5939edd7ca68513c58ca4dbf372f5961d09f56b6d5e10f6504f102bf2
font_01_sfnt_off0000b29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29F 10416 bytes
SHA-256: c436766b43a956d6d250ca8d76719d4c0cd9ba288f0e32bda0384d07dcc76c25

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