Malicious PDF — malware analysis report

Static analysis result for SHA-256 1beaee4e4cb6585b…

MALICIOUS

PDF

45.7 KB Created: 2020-09-01 00:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea399620f45175f0b96754e371211132 SHA-1: 2edbd0a1372f2ec9b687f692a949fe5c44a2a6b5 SHA-256: 1beaee4e4cb6585bd536cfc7d8449d53a96a48205a377d9c7ae801ac2d021a26
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with text related to a movie download. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm or a method to obscure the true destination. The ML_NYX_PDF_MALICIOUS classifier also strongly flagged this document as malicious. No scripts were extracted from this sample.

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=madagascar+movie+480p
    • https://cdn.shopify.com/s/files/1/0431/2442/4870/files/vastu_shanti_invitation_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4688/files/gujevixaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5572/6238/files/noxevemejitonogomuwinil.pdf
    • https://static.usrfiles.com/ugd/cd79e3_ed23e5bf99de41cf9417d42bebe8bc2a.pdf
    • https://static.usrfiles.com/ugd/fa6f14_d4d4e22ec40842c99f658d2db0ff53c3.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_0810def100f441a18b2a31f8f59c91c3.pdf
    • https://static.usrfiles.com/ugd/34ec99_b668e921351f4c5a94b66183320301e3.pdf
    • https://static.usrfiles.com/ugd/c836c3_a7bad155d16a45ccb28d16c5b4469438.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_edc503b245c540c2ae53cef084a3a849.pdf
    • https://static.usrfiles.com/ugd/253000_739c7cc0190a4a549844dcbd073fb6e6.pdf
    • https://static.usrfiles.com/ugd/9e53d4_c95bc05f932c4583834aaedb04cc9291.pdf
    • https://static.usrfiles.com/ugd/6846fe_f356582b4a6f42438eb9ea8fa227e00a.pdf
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/learning_english_for_adults_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/47181765344.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0938/files/happy_wedding_anniversary_images_hd.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2919/files/harnett_county_inmate_population_report.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000579e.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x579E 6744 bytes
font_01_sfnt_off00006883.bin
36f009bb3594ac92ee79321bd7b9e9d99f171986e11218c03157fc6523422e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6883 5852 bytes
font_02_sfnt_off00007c6a.bin
3092c4f882d107170acdb0117142326a65d95830a6062e15d27975be89a55008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6A 1888 bytes
font_03_sfnt_off0000859e.bin
1305ab3c3f7995bd211103106f10f0e4d15efe22de3dc9af5f4059484716a6aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x859E 10064 bytes

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