Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d094f3181532ef0…

MALICIOUS

PDF

50.1 KB Created: 2020-08-25 16:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c66ab467daa774c06f074049a40cef6 SHA-1: c8993f4d40c35efac0e73f856bde555edc9bab66 SHA-256: 5d094f3181532ef05bb47fc21428417a1cd22ba17f36b17ce425ebf76ee0a07b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one critical link pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'longitude and latitude worksheets' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a malicious redirector indicates an attempt to lead the user to a harmful site.

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.com/pify?keyword=longitude+and+latitude+worksheets+6th+grade
    • http://files.alexandramarin.ca/uploads/1/3/2/8/132815008/5b2a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/50035353745.pdf
    • https://cdn.shopify.com/s/files/1/0434/2461/2509/files/used_gun_values.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/gipes.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/dual_wielding_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/5869629893.pdf
    • https://cdn.shopify.com/s/files/1/0429/3620/5479/files/pefiwowumenarewofunipixe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3683/3954/files/automate_the_boring_stuff_with_python_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/bachelor_of_business_information_technology_wikipedia.pdf
    • https://cdn.shopify.com/s/files/1/0435/0309/1872/files/71778586664.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/wijusakalapanesebalopo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006598.bin
ea2bd139360f66a140753f245793fbf1d0b79d0edd1acc113f0d5db8126e7c4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6598 5340 bytes
font_01_sfnt_off000077d4.bin
4db8e6615fad23abfec04c79c83e4969f2f9bc4b55be03922ef078ac95a01016
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D4 14844 bytes
font_02_sfnt_off0000a643.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0xA643 16204 bytes