Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee58502572288e41…

MALICIOUS

PDF

100.0 KB Created: 2020-08-25 04:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0be1ca8eea3ef84839705c87e2a11b1 SHA-1: 44eebb47221fd2ec88d70dc1f5d85d69de61e948 SHA-256: ee58502572288e41dda850d34ad9de5bdfb51b6d91b5136d340dbd312ea5fb06
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file was identified as malicious due to its inclusion of a link farm containing numerous external links, with one specifically pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to this malicious redirector. This suggests the primary purpose is to lure users 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.ru/pify?keyword=dreamer+ro+guide+for+newbie
    • http://kemukuv.southafricanmi.com/uploads/1/3/2/6/132682787/nizagerozabusek.pdf
    • http://files.math2impact.org/uploads/1/3/1/6/131606123/fa0725139bf.pdf
    • http://sebokano.westernfamilyfarm.com/uploads/1/3/1/1/131164250/pitesukaginozex_maxuwunupej_wavofab.pdf
    • http://zireguvu.yassvalleyk9.com/uploads/1/3/1/8/131857419/gojujukix-xawuxumofoj-tajugidojanivo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0282/files/19372302649.pdf
    • https://cdn.shopify.com/s/files/1/0437/7791/7090/files/best_rpg_games_online_no.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/python_floor_division.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/2009_cadillac_escalade_performance_parts.pdf
    • https://cdn.shopify.com/s/files/1/0435/4716/4826/files/crime_stoppers_report_drink_driving.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/fighter_aircraft_design_project.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/jamafugixoseka.pdf
    • https://cdn.shopify.com/s/files/1/0432/9845/5705/files/65379529501.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/delinquency_report_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/nand2tetris_project_1.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/69082968190.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/51153225301.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
stream_005_off00012f9c.bin
bacde6105362a96df2e5ac040c96616cc79475919e88ec5c7a170134dfe23075		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12F9C 14240 bytes
font_00_sfnt_off00011dcb.bin
700740eb352f13e808e62cc448c2029ea37824bd9058dfe614a9598777640d08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCB 5248 bytes
font_02_sfnt_off000156d2.bin
b2061c4cec48283eef6afed5a7b855d5be35f738c159831fcf8c2f155c744581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156D2 13680 bytes

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