Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b17d4bc35611511…

MALICIOUS

PDF

45.7 KB Created: 2020-08-20 09:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d63f54e237ba10e06615358ee07940e8 SHA-1: 85ceb03a63dcd7cb2f29538e748ba6fd9b02f75e SHA-256: 7b17d4bc35611511152cff39c11c2f05d5d24f8f80f8cd171c919c7707d27978
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though partially corrupted, includes a URL that is also flagged as a malicious redirector. This suggests the document is designed to lead users to malicious websites, likely for further exploitation or phishing.

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.cc/pify?keyword=anonymous+sources+in+news+reporting
    • http://files.triciaatpuremagicvacations.ca/uploads/1/3/0/9/130969297/nadat.pdf
    • http://files.houstonhazard.com/uploads/1/3/0/9/130969430/revamu.pdf
    • http://fevovuku.antennabooks.com/uploads/1/3/1/4/131453329/tutikifale.pdf
    • http://files.lightofchristgarden.org/uploads/1/3/1/6/131637953/9c4d074fd2f40.pdf
    • http://files.patricianesci.com/uploads/1/3/2/6/132695329/serubamo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/6660/3158/files/dagojepibukav.pdf
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/fetarigosubivupejeta.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/dujefodafa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/brooklyn_heights_equinox_class_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0429/6710/5687/files/adeptus_titanicus_rules.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5798/files/number_worksheets_for_preschoolers_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/difference_between_inflectional_and_derivational_affixes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/applied_science_diploma_2st_sem_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/89297430480.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/business_writing_exercises.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_off00007655.bin
ef2f9b5233a3c16a248ccc4a33424153fabfc5b43d899fd77bc8837227ae527e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7655 5196 bytes
font_01_sfnt_off00008803.bin
9465639066c66e47d8d6c1b586e99ec8b42dcc28764ae804525463fb2c2dcb59
pdf-font-stream PDF embedded font (sfnt) at offset 0x8803 9964 bytes