Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b95353979be678…

MALICIOUS

PDF

44.6 KB Created: 2020-08-08 04:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7d7a5a4ca76e790a2ef7da12783ae58 SHA-1: 849af6a2a7e4a24b4d04139de490813e15cdc969 SHA-256: e3b95353979be6786932b69f016a1badd865cb1f4f531f42319a9ee96c0cc585
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a textbook. This indicates a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains the malicious URL and other benign-looking Shopify URLs, likely to appear legitimate. No scripts were extracted, but the presence of the malicious redirector is a high-confidence indicator of malicious intent.

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=leibel+and+phillips+textbook+of+radiation+oncology+pdf
    • http://files.vickiofficer.us/uploads/1/3/1/4/131408899/6664525.pdf
    • http://files.crystallakept.com/uploads/1/3/1/4/131453555/moniminekadotix_dudalivik_bizaparo.pdf
    • http://files.hbcutravelers.com/uploads/1/3/0/7/130739814/917310.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/54183247138.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/50408321960.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/vologesada.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/old_vedic_astrology_books.pdf
    • https://cdn.shopify.com/s/files/1/0438/2759/3376/files/ielts_speaking_vocabulary_band_8.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/13546624489.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80084587067.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/carcinoma_basocelular_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/gosaxopagipatezezubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7781/9802/files/67742383496.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/tajimibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/lekabimemosuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/36995306252.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/wuzuxet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/tetamujibijolekiju.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004be4.bin
241ed2be9a079b3bbdf40b4f25c9b2fdbc4e7ee19b90c9805834f6ebcea0fa03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE4 5520 bytes
font_01_sfnt_off00005ea0.bin
3de0d5e82d4fae454973e8d26184500f45570c0caab7e3448f82e635d4a2d286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA0 10056 bytes
font_02_sfnt_off0000813b.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813B 16204 bytes
font_03_sfnt_off00009668.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9668 4324 bytes

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