Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea161527d02463df…

MALICIOUS

PDF

58.1 KB Created: 2020-08-18 19:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8bf0ef07a2bfb577d02e9bd116c2ccf SHA-1: 6367431bbd9dc0c7994c2a9aa31fd9b66b643248 SHA-256: ea161527d02463df66b68241ea010e58d89c28d86c1482cda872119302f6b9ea
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, https://ttraff.cc/pify?keyword=star+template+interview, is identified as a known malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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=star+template+interview
    • http://nulak.cayugaheightshistory.org/uploads/1/3/1/3/131383314/daderozuzej.pdf
    • http://files.457-glas.com/uploads/1/3/0/8/130815095/ddfca3d.pdf
    • http://rabuv.kinderdanceaustin.com/uploads/1/3/2/7/132740505/davetuv.pdf
    • http://files.comicbooknoob.com/uploads/1/3/1/4/131408970/negekivur.pdf
    • http://files.thepuckcollection.com/uploads/1/3/1/4/131438353/kisafabagalur_vuvodeb_jujobununagibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/marcus_aurelius_meditations_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/31560336404.pdf
    • https://cdn.shopify.com/s/files/1/0438/7035/5611/files/action_research_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/8_ball_pool_pc_game.pdf
    • https://cdn.shopify.com/s/files/1/0439/4365/7627/files/amgen_biotech_experience.pdf
    • https://cdn.shopify.com/s/files/1/0434/4043/9446/files/modelevamokeri.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/55974139030.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/wogitisunameka.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/gukisiramu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/josux.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/
    • https://cdn.shopify.com/s/files/1/0429/50

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ad9.bin
2c10c2d5c7c5a9e1bba54c1aa5ff6ecce54495e3878d17ba91889adab8762983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD9 4720 bytes
font_01_sfnt_off00008ab5.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB5 1800 bytes
font_02_sfnt_off00009343.bin
dd14b8a99ce2cab5589f3a0da13ecc14a3d60e12d3e8933b9ad3300baea9d81d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9343 10288 bytes
font_03_sfnt_off0000b6b7.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B7 16312 bytes
font_04_sfnt_off0000cc42.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC42 4324 bytes

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