Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c5a19f3fce0a75…

MALICIOUS

PDF

63.5 KB Created: 2020-09-06 23:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e642c234613bbdf1c59849f69436b98b SHA-1: 2e3f41c1eb5b17585d60993b4824d6dae79dcd8b SHA-256: e3c5a19f3fce0a7555b17425f237cca22bd48358d2a7f27af5d2d414ddfc0d6f
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, directing users to 'ttraff.me'. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to Shopify. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting a social engineering attempt to trick users into clicking the link. No scripts were extracted, but the presence of a malicious redirector and link farm strongly indicates a phishing or malware distribution attempt.

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.me/wix?keyword=equilibrium+constant+problems+and+answers
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/32381066961.pdf
    • https://cdn.shopify.com/s/files/1/0437/0140/3801/files/vasikiwotezivebaribez.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/ditotisuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66456909559.pdf
    • https://static.usrfiles.com/ugd/576447_04b60bd563084e6b83e3e5a122660114.pdf
    • https://static.usrfiles.com/ugd/87d215_3bb50d1113f44fac8e8dd59561a7b4a4.pdf
    • https://static.usrfiles.com/ugd/d775a9_6351eaaf839c4e07936e91cbdefe0e2b.pdf
    • https://static.usrfiles.com/ugd/bc4951_b9b0114498e8422cacd90aa048548b68.pdf
    • https://static.usrfiles.com/ugd/04e6f9_f6534ee9ffb24deea186296fea19eb0c.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/mowukezenipatovifiporopog.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8935/files/the_borohydride_reduction_of_camphor_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/bunadizelezazimovidamofe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0823/7473/files/namifipifisurebepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/10967955376.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6102/files/driver_chipset_intel_b250.pdf
    • https://cdn.shopify.com/s/files/1/0452/2138/0247/files/biopsychology_john_p._j._pinel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/54218840285.pdf
    • https://cdn.shopify.com/s/files/1/0438/3935/7093/files/sda_church_manual_baby_dedication.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_off00009a5c.bin
50b333e0dfcfd1741acc21e9b0088657e6b40fd2dc3021cbaeb16edf9821668c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5C 5532 bytes
font_01_sfnt_off0000ad21.bin
e350b5fdd168095760420c77ac7c6e8837cc4b88ec5734dde68dbdbd6a288e87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD21 14680 bytes
font_02_sfnt_off0000db9a.bin
c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 16060 bytes

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