Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31d7c001e1cc95a…

MALICIOUS

PDF

38.8 KB Created: 2020-08-26 09:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52512265a64ae9c829661a1f56c90852 SHA-1: 5a66dce6004eab80405c282d8ff52b23f02468f6 SHA-256: b31d7c001e1cc95aa0c188430f64b144eae73e3d4f7936714c1caa6ff6d33544
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that appears to be part of a link farm designed to manipulate search engine results. The document body itself contains text related to a 'solution manual download', suggesting a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=genetics+from+genes+to+genomes+4th+edition+solution+manual+download
    • http://buloki.lgmcferren.com/uploads/1/3/1/3/131383629/c851d78ae4c857.pdf
    • http://pedomefi.redlineinstallers.com/uploads/1/3/2/6/132680981/jojufunijovowewobu.pdf
    • http://setebipob.kidsalldressedup.org/uploads/1/3/1/4/131438282/4eca73c.pdf
    • http://files.projectfulfill.com/uploads/1/3/1/6/131636651/982358.pdf
    • http://files.conversazioniconilventre.com/uploads/1/3/2/7/132740412/d7430d4c.pdf
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/atomic_absorption_spectroscopy_file.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/mathematics_book_class_8_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/double_sided_adhesive_sheets_for_cricut.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/66634737954.pdf
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/jessica_reddy_nude.pdf
    • https://cdn.shopify.com/s/files/1/0433/3908/8027/files/vumivinapigupitow.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/adobe_photoshop_lightroom_free_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/49269093103.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005894.bin
4c9bf3f62b271f41f963f8f1a7d84627acfaff6dd06e90dae029286d1280c30a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5894 5648 bytes
font_01_sfnt_off00006bb6.bin
9d6316f700f961bc68027536d783982029591e5057f3269d5ac9f04879030ddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB6 10044 bytes

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