Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee76d342ce629362…

MALICIOUS

PDF

90.6 KB Created: 2020-08-29 13:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b1d8944b56e3d6bf827c5a6797226f SHA-1: 1248995946ad84f2ae7a779f43d7378634d942ce SHA-256: ee76d342ce629362caf11f8fed45fdeba8076112533718aed929a833b87dbd12
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary malicious redirector URL being https://ttraff.cc/wix?keyword=borderlands+2+playtime. This URL is likely used to redirect users to a phishing or malware distribution site. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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=borderlands+2+playtime
    • https://static.usrfiles.com/ugd/b8c837_e91ff4138f344b0bbd5ffb5a6cf491fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_4256e1a6ffbf4d08a811cea1e5adb1dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f537d568060488083cfdf7324a94cd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_37699ed67b604364ac23f41f386d8115.pdf
    • https://static.usrfiles.com/ugd/b8c837_99b5213a15f74a8fbdafc03698a44b45.pdf
    • https://static.usrfiles.com/ugd/b8c837_afe59185dfcb4e8d95f30066b694701f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0e00486f5c64b769699da40d123d8b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_1da6a373220e4bd8a96f493599bd8d68.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f413ce93a3648a7b8e8486be09583c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd8e3d9ad5a3470aa862d8405275c42c.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/90788102503.pdf
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/tnusrb_answer_key_2020_pdf_download_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/9285902749.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 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008897.bin
f92dd7a04d661103da2efe523d356556d2c51a602f866056623ed624a5dd9618		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8897 4780 bytes
font_01_sfnt_off00009972.bin
9d1ac2485dd74eff0e2023b9cea0fdd07c2dd07cd3b1d6ff6bf65d3432122274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9972 5388 bytes
font_02_sfnt_off0000abbb.bin
b8fc65bbba619135cab7780f9beab6cefe83e63bb006e438305ae7529d8adaf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABBB 8904 bytes
font_03_sfnt_off0000bd6b.bin
74ff0cf37497456211807ac2b16a97b20d566c25cd6df8ccb4527a295833be9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6B 2052 bytes
font_04_sfnt_off0000c67c.bin
d998c786e767c4f1858fc942f35b80de8094930702a588b46c83e37ddd930a6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC67C 3488 bytes
font_05_sfnt_off0000d44c.bin
9250f1ac824488a85acfc66ed52dcab647e61230654ce117cb7e705fd050ef59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD44C 6548 bytes
font_06_sfnt_off0000e431.bin
a30997c041d95837dfd0be30c46fc1d437a007cbdc2ffbe0c6afad36a5542666		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE431 3704 bytes
font_07_sfnt_off0000ef62.bin
1ec58c6be1a2dfe779e760f35c41a2f7f0c20ebe503d229b13e2fdbef5a23887		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 21608 bytes
font_08_sfnt_off000130b7.bin
ec6c1b4259b2586afb3c3c821d5465d0c1cd125726e2fa5d29286c764d659eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130B7 18664 bytes
font_09_sfnt_off00014ea1.bin
52bd216243e45381ae4b643fc87b3a648b2e421ab9d4603e2f2361700c8eda86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA1 2304 bytes

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