Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9792336b2246d70…

MALICIOUS

PDF

38.1 KB Created: 2020-08-30 08:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e54cf2cf260fde00dc9f8459102ff333 SHA-1: b7513da6a68b68cd9852fc48e3c69b05b50b5c47 SHA-256: e9792336b2246d70034bc8f538f85fe97612ac7024a0c745c8c54c113cb8e2f8
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via a deceptive document.

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.com/wix?keyword=perspectives+on+the+world+christian+movement+ebook
    • https://static.usrfiles.com/ugd/e33828_8b281182d8994eceaa593ec2a3f2e008.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5576bb4e82e473a9abac39e90c939a7.pdf
    • https://static.usrfiles.com/ugd/ecec20_bdffd6393e2941feb733371d2589efb0.pdf
    • https://static.usrfiles.com/ugd/de65f7_afe32b4aa27b410facf434a9d5459040.pdf
    • https://static.usrfiles.com/ugd/b8c837_a82f4c152217449f96f16aabdbc772ee.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/wuzax.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/xugagof.pdf
    • https://cdn.shopify.com/s/files/1/0461/5274/5123/files/pufolalufujabogawa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4248/6944/files/zotifamebuwemaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/naina_video_song_ankit_tiwari.pdf
    • https://static.usrfiles.com/ugd/89064d_bfa2893f6c014d39a198baa1922241ee.pdf
    • https://static.usrfiles.com/ugd/06497e_d22e59f072fd4c989c2a3a0fb2a3a37b.pdf
    • https://static.usrfiles.com/ugd/a91264_b28912e12577465eb1a0e371ee00731b.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_off00004992.bin
d6729e5586770394fd3b931110ac58e28bbeebf5b4b83049de72bd30053eba35
pdf-font-stream PDF embedded font (sfnt) at offset 0x4992 5456 bytes
font_01_sfnt_off00005bf4.bin
484348d9966440a829a811d421b7b295f4529cb2e204e7225ebb514b910a2c26
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF4 9672 bytes
font_02_sfnt_off00007d0d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0D 4324 bytes