Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f59bbefe0d0c5f5…

MALICIOUS

PDF

44.2 KB Created: 2020-08-12 13:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25f7ba7d6073d272e3276f89e5f514e0 SHA-1: 6a86c8972e6e8f92ab06db701055c23181f9f85f SHA-256: 0f59bbefe0d0c5f535f9207d016ba2bd75529916a2709757db4ce2c661f2373c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the document is designed to trick users into visiting malicious sites, likely for further exploitation or phishing.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=aplikasi+convert+pdf+to+word+terbaik+android
    • http://xugunizet.markchrislermusic.com/uploads/1/3/2/8/132814930/3d548f02b44.pdf
    • http://files.heatherbrittonphotography.com/uploads/1/3/0/8/130815026/e78fdfbe.pdf
    • http://files.1travelshop.com/uploads/1/3/1/3/131384583/fe3c2276f78487b.pdf
    • http://bubiwifo.madcitybadgers.org/uploads/1/3/1/4/131453284/4636103.pdf
    • http://files.beautifulrooms.london/uploads/1/3/0/7/130739059/lemubusiwixi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/eat_pray_love_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/81151420634.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9240/files/rituxepi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/45265246144.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0605/files/68287462342.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/visuvafatule.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/49490438263.pdf
    • https://cdn.shopify.com/s/files/1/0431/9572/8029/files/mugeselugi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/gifovokujidewokidufesomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6608/files/gofurizupomojamodit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/sikarorok.pdf
    • https://cdn.shopify.com/s/files/1/0430/2723/4969/files/nakirifutediwigunetipi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1187/2667/files/causative_verbs_lesson.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/5e_gold_conversion.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d66.bin
4b33054458717be4b623206dfb7cb53bdfc750c115bdd7e971db5cfd9480f810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D66 5496 bytes
font_01_sfnt_off00008027.bin
d079afbce96b6df4542930732ae0aa9c539d38469ac8b85bd4a46c9222416146		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8027 10344 bytes

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