Malicious PDF — malware analysis report

Static analysis result for SHA-256 702c9867c11d97ca…

MALICIOUS

PDF

45.0 KB Created: 2020-08-05 14:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b14684a44a0c00177c8681021fb4813f SHA-1: 1bda2bbe8a5d1408cf5ca882b0f1aeabf06a11ff SHA-256: 702c9867c11d97ca6fd00b915ac665814b42307f237b0f6e5c26a782e9ee9756
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate search results for IELTS materials, but the primary link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL and other URLs that are part of the link farm. This indicates a phishing or scam attempt to redirect users to potentially harmful content.

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.cc/pify?keyword=makkar+ielts+speaking+pdf+free+download+2020
    • http://files.boernevillageband.com/uploads/1/3/1/4/131407112/xoxugavulusepuz_jepeguzinor_remapozul_dazenuboda.pdf
    • http://files.treevalleyfencing.co.uk/uploads/1/3/2/6/132695258/5464022.pdf
    • http://files.lcisorchestra.com/uploads/1/3/1/4/131438809/23fd158b.pdf
    • http://files.guildofoccultsciences.org/uploads/1/3/1/4/131453124/f4939af0fe.pdf
    • http://files.rominastiebenphotography.com/uploads/1/3/1/6/131606392/pewebuvulo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1647/8110/files/62760241579.pdf
    • https://cdn.shopify.com/s/files/1/0434/3611/4076/files/71265260421.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/zumefoxonakuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/263700497.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wurawosupamajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0108/files/377086886.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6578/files/nusunumiderek.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/torijupaximiwaregiwap.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/present_simple_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0436/3016/6176/files/96951013387.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/nox_shuttering_performance.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_off00007255.bin
24024e1bca0e77335b6f4d9d8da4f54621fa397c0d2fe75f43a7d02ff21b8392		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7255 5644 bytes
font_01_sfnt_off000085c4.bin
2f9bfad35f0f42fbdede1b222dabbdce617d0bd8adb636efe719e13c3b49862c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C4 9588 bytes

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