Malicious PDF — malware analysis report

Static analysis result for SHA-256 28bb2f43b4dce891…

MALICIOUS

PDF

46.2 KB Created: 2020-08-20 12:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25a79fb56dd01b7d9c7e0c01f38b1d5e SHA-1: 9832f375e7be25c7bdca70e7a3ba77d9a3fde89f SHA-256: 28bb2f43b4dce891edd8a3b9c8772ad7d1138f4e5dd71cd57919df86f7583a6a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=hollywood+movie+actress+hd+wallpaper', which is a strong indicator of a phishing or scam campaign. The document body, though heavily obfuscated, contains similar text, reinforcing the lure. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content or to distribute further malicious files. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=hollywood+movie+actress+hd+wallpaper
    • http://files.paradisemex.com/uploads/1/3/2/6/132695994/fifuzo-kewugiwufemep-vekefen.pdf
    • http://files.arthurleewilliamsii736.com/uploads/1/3/0/7/130775979/tusisezive-kenebab-vodofemukonizin-bisixubuxosix.pdf
    • http://rutonev.waspiowa.org/uploads/1/3/0/9/130969723/3762175.pdf
    • http://files.axiotac.net/uploads/1/3/0/7/130739621/8bc3ddc7cdda69.pdf
    • https://cdn.shopify.com/s/files/1/0432/5074/5512/files/article_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/66757281709.pdf
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/27831220239.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4366/files/mesiwagujomuvubiganonod.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/47829007890.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/xibumalegiwulojes.pdf
    • https://cdn.shopify.com/s/files/1/0459/9663/8365/files/91640767270.pdf
    • https://cdn.shopify.com/s/files/1/0430/2009/1555/files/business_law_text_and_cases_14th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1425/files/50286566000.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/kexanobabogabu.pdf
    • https://cdn.shopify.com/s/files/1/0452/1476/1120/files/assam_police_recruitment_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/brand_awareness_social_media_and_digital_marketing.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007513.bin
fcbc35603aab065786c136124ed3fae29841de8f542251d15f7d021135925734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7513 5528 bytes
font_01_sfnt_off000087d1.bin
c665d7d6c27fcea3bbb05c4f9e9cf068b6151f7766bc80513afa28c445fde5f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D1 10364 bytes

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