Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0b412041bf2e40…

MALICIOUS

PDF

37.5 KB Created: 2020-08-29 20:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34bb06022702747e52cb6c306eb646cc SHA-1: a669beb9fe25f115d4be0da7683ab32683623050 SHA-256: ee0b412041bf2e4076700f87416c1a318d1efaa1079a5d470c2d8e6d8d032b02
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious URL, disguised as a search result for an academic paper. This is supported by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the target URL, suggesting a social engineering lure to drive traffic to malicious sites.

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/wix?keyword=elementary+statistics+bluman+9th+edition+pdf
    • https://static.usrfiles.com/ugd/b8c837_5cb81d1e40c9449fbe1879366c177ecd.pdf
    • https://static.usrfiles.com/ugd/bb13a2_12a7b6575e7740debc82416656fa5888.pdf
    • https://static.usrfiles.com/ugd/bb13a2_0f407fcb719e428197165d23aa2da794.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab1d35f27caf49f5a018856694e8090c.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/xbox_one_driver_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0447/9506/8567/files/absolute_duo_light_novel.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/zyrtec_adforum_208.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/hamdy_a_taha_operations_research_an_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/past_simple_v_present_perfect_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0439/0099/3704/files/lufudapiruvemuvaduji.pdf
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/bartleby_the_scrivener_text.pdf
    • https://cdn.shopify.com/s/files/1/0437/1477/3147/files/nadutumadilu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1829/files/zobaliluzujulujeseka.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/pobewujulizitovawinom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045d9.bin
a4d0db98fe5d01fead507f814f9b44cabbc43d09d3010f143b724ff44134c56b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45D9 5632 bytes
font_01_sfnt_off000058c3.bin
48cf7b0b7d807786fd40a18b201e03c6f34c172392fa34b431b9bd310a3fa349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C3 10048 bytes
font_02_sfnt_off00007aa1.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA1 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.