Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e8c5745817f079…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 17:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4da858664c78e9a7ef24116adb500219 SHA-1: 4444ea67ed1ffbf6e856bdd1418c38bd6650b937 SHA-256: d5e8c5745817f079041efb0e622122d067f5d2cb9d13e539059b6b4366c05813
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to direct users to malicious sites or manipulate search results. The primary malicious IOC is the redirector URL.

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=we+are+all+cannibals+pdf
    • http://files.tagmasters.us/uploads/1/3/0/7/130738752/rilopujumerovizilova.pdf
    • http://files.walleysbookreviews.com/uploads/1/3/0/7/130740551/topumogiv-lafimedoburaz.pdf
    • http://jakutazij.sanctuaryatwoodville.org/uploads/1/3/2/7/132710592/9920b.pdf
    • http://sagiwix.concretecontractoromaha.com/uploads/1/3/0/9/130969723/9598754.pdf
    • http://wesuzis.archaeomonth.com/uploads/1/3/0/8/130814017/wipevexuwivakil.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/19989875991.pdf
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/command_block_enchanting.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/albert_camus_the_fall.pdf
    • https://cdn.shopify.com/s/files/1/0431/2144/2977/files/barron_s_600_essential_words_for_the_toeic.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/60874488845.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/toresikakafedutura.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/miragifus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/3223535353.pdf
    • https://cdn.shopify.com/s/files/1/0445/3564/4319/files/centrifugal_pump_curves.pdf
    • https://cdn.shopify.com/s/files/1/0436/2564/4192/files/bavabibifazajedofoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8111/2483/files/follow_a_player_script.pdf
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/discrete_fourier_analysis_and_wavelets.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/fusionner_deux_en_une_seule_page.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/varovalofudujuvetediwi.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_off000068d5.bin
66cc49c59f38d08bba7c78703e7d11ae811689c9271c8cb267000270502d0a3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x68D5 5300 bytes
font_01_sfnt_off00007af3.bin
fa76503a3338c2c7e0c4ab82bf02703d5e7d8f063b863fa0b53cbfb42b6bb3e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF3 10556 bytes