Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f41aaba25a49b13…

MALICIOUS

PDF

144.5 KB Created: 2020-08-11 18:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcc3c84aa4bf3e24c8f6dcedaf152513 SHA-1: 05fc969c674ea1a4b7ceb7288ee8c463c10e749e SHA-256: 7f41aaba25a49b1303caf50b900dc06b778c2cca1715c996fbabfb8fa5d6d544
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=arbaeen+nawawi+pdf+arabic'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=arbaeen+nawawi+pdf+arabic
    • http://wubaw.visionrealtynw.com/uploads/1/3/1/8/131856584/rijopimuguragerexuxa.pdf
    • http://files.sbt-oman.com/uploads/1/3/0/8/130813834/4470c699.pdf
    • http://files.hartsvillemasons547.com/uploads/1/3/1/4/131453302/847060.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/conjure_volley_5e.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/kabuliwala_story_in_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/1409/2960/files/caterpillar_forklift_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/5744/5029/files/xetafalixiwozutojiga.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/66047441656.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9604/files/panama_city_beach_weather_radar.pdf
    • https://cdn.shopify.com/s/files/1/0434/8284/1250/files/alpha_male_strategies_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.pdf
    • https://cdn.shopify.com/s/files/1/0438/3762/0386/files/97759364745.pdf
    • https://cdn.shopify.com/s/files/1/0443/2855/0556/files/86165013330.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/jutef.pdf
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/55474927713.pdf
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/79896319669.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001f96f.bin
af7bf264fc3de8a203e2b0891f6fe64bd443e36cc2628a3139435f9154ca04cd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F96F 34628 bytes
font_00_sfnt_off0001c4f1.bin
69c2ab938d685f5f1c7eed984c2223710ad7bf84228b54f027e398077ad460f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4F1 5160 bytes
font_01_sfnt_off0001d691.bin
1cc2107e6f54544b24897300941c7a230b3e7c184fc8c7e950751736c387dac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D691 10120 bytes

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