Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14bd5710a9d23cd…

MALICIOUS

PDF

59.1 KB Created: 2020-08-18 15:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cae40c72b1983be6497bf40f1c24651c SHA-1: f88f7038111f44da13f45bfecc5af103af62ebf3 SHA-256: d14bd5710a9d23cdb52a8bb0074658321463a77aaa328b7cf0d12cc4296404b4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. Another critical heuristic flagged the document as a link farm, with numerous links hosted on cdn.shopify.com and other domains, suggesting an attempt to generate traffic or distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=arcore+by+google
    • http://files.southpasgirlscouts.org/uploads/1/3/1/6/131606965/dutinig.pdf
    • http://files.blackmoonpsychotherapy.com/uploads/1/3/1/4/131438013/b39408c6df9e.pdf
    • http://files.therapistsmap.com/uploads/1/3/1/4/131438142/muketogaxuw.pdf
    • http://files.thecakecottagemurrieta.com/uploads/1/3/0/7/130775537/velikafuroluvad.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/admin_officer_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0957/files/mefoxokafegupuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53295895336.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/3994/files/fokatapeva.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/mapa_mundi_ibge.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/42878257290.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0448/files/jisazuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/maxazebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/najizevutejepiginuxesu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/pupipurobegisixan.pdf
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/ebola_virus_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/5615/1190/files/39647125253.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007804.bin
20cd75ca12c5cea9b4bd5cb6b05245312220dbe46a96ac785fa8317c97573066		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7804 5948 bytes
font_01_sfnt_off00008c81.bin
31c835603d7d67146320a9804e882e32228ef671891afbc3264f64aa98b9f275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C81 4812 bytes
font_02_sfnt_off00009cf9.bin
a971ef60f1c4ade4ee5d758740ab7727bfe8afdf82ca46fa23343cfcdd394941		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF9 14164 bytes
font_03_sfnt_off0000c9bd.bin
f375f760f39963ce4bd6e9eb2d56ec9aee132766bcb2b6ca8a90c51d53fc5f7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BD 16184 bytes

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