Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b413e08b90ba52c…

MALICIOUS

PDF

50.7 KB Created: 2020-08-11 20:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bdaa9d342c75191a23ed4478e85c3ee SHA-1: 6bc949dc460dbd1efbcdf18834de784b54c6e8b7 SHA-256: 1b413e08b90ba52ca73a7d353860a728bae9b1d575e022f8f8f7aa7a20ee72f1
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=problem+solving+strategies+pdf+free+download'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, including benign ones hosted on Shopify. The document body, though partially corrupted, contains text related to 'problem solving strategies pdf free download' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a download button lure further supports the malicious intent.

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.
  • 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
  • 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.ru/pify?keyword=problem+solving+strategies+pdf+free+download
    • http://files.cityofamilliondreams.com/uploads/1/3/1/0/131070307/3034260.pdf
    • http://files.wandinpark.com/uploads/1/3/2/8/132814929/wefulibisikaniware.pdf
    • http://files.theditr.com/uploads/1/3/0/7/130739015/tazuwujepep.pdf
    • https://cdn.shopify.com/s/files/1/0432/3832/6432/files/88337482022.pdf
    • https://cdn.shopify.com/s/files/1/0431/2029/6090/files/55416377781.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/70107107366.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/9657784367.pdf
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/60691128136.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/musat.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/minecraft_sharpness_enchantment.pdf
    • https://cdn.shopify.com/s/files/1/0440/5886/9910/files/chemical_engineering_technical_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3439/files/top_15000_corporations_in_the_philippines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/baxifidenagajaxonazaw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e07.bin
9e9c12c37e39babf5b91b9e2340c043d6f489f80c71a9c8c4c9802b4ce3ceab9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E07 5444 bytes
font_01_sfnt_off00008079.bin
c70a5aea3c00d00c515ca47438f5f472d3aa82fee9a2dcd0343e07e057c0076a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8079 15208 bytes
font_02_sfnt_off0000afdd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDD 4324 bytes