Malicious PDF — malware analysis report

Static analysis result for SHA-256 81971889b3225434…

MALICIOUS

PDF

44.1 KB Created: 2020-08-06 15:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bae7d666d55249fa233b50a165e531a SHA-1: aa4445efa6eda55f958f8b33714fb30e5f36503a SHA-256: 81971889b3225434adbd7d178e3e7af442b0e0b7ce804cd60b2f235582ee9690
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=personal+development+plan+template+pdf' and also lists numerous Shopify URLs, some of which are confirmed benign. The presence of a 'download button' heuristic suggests a social engineering lure to encourage clicks on the malicious link.

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.com/pify?keyword=personal+development+plan+template+pdf
    • http://files.avenue.org.uk/uploads/1/3/2/8/132814086/3863748.pdf
    • http://files.smalltalk-maadi.com/uploads/1/3/1/6/131606046/mafavafeze-bowepat.pdf
    • http://newosi.godsgracehawaii.com/uploads/1/3/1/4/131407406/wulekus-lifidesopaboza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1900/9173/files/bright_futures_4_year_old.pdf
    • https://cdn.shopify.com/s/files/1/0437/3174/6967/files/betojezamazawadufiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/8362023666.pdf
    • https://cdn.shopify.com/s/files/1/0434/2041/8198/files/crossbows_and_catapults_rules.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/tnpsc_group_4_aptitude_questions_and_answers_in_tamil_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/jujalazenajakavuvuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/4512/5281/files/raxudejogifubofilaluwex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/78222397701.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.pdf
    • https://cdn.shopify.com/s/files/1/0428/8721/7319/files/pasepolapofunekilara.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4615/files/82800532507.pdf
    • https://cdn.shopify.com/s/files/1/0433/0972/7912/files/jemizodojevu.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_off00007002.bin
704d65f755581f8c8df3438a5e64dfb168f3557a60634cad236dcbf55daa5132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 5248 bytes
font_01_sfnt_off000081ce.bin
1d013ccfd99a64e7fa7221a5979b77c4fd2fe4733fb52ce1ff51d3a347ffc186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81CE 10000 bytes

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