Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2849adf18d27b70…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 04:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f06b6af4f9550364f186a208816b1e2 SHA-1: c1f9e97c51854b95f22d08eebc6a0859ef498357 SHA-256: e2849adf18d27b70e4de4e1c6a3130a83ab4a43e327a06eed7102a2dbc5180f4
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and heuristics indicate it contains a malicious redirector link and a link farm. The document body contains the URL 'https://ttraff.com/wix?keyword=my+name+in+hyroglyphics', which is identified as a malicious redirector. The presence of numerous external links, many pointing to PDF files on static.usrfiles.com, suggests an attempt at SEO manipulation or a link farm to distribute malicious content.

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=my+name+in+hyroglyphics
    • https://static.usrfiles.com/ugd/6116da_bdd48268f1b54cb8a188abe2fa42303e.pdf
    • https://static.usrfiles.com/ugd/10e3af_fba8dd422ae945ccbac3d04a92d1893b.pdf
    • https://static.usrfiles.com/ugd/99965f_5d590a56fea84deea2a6377e2498210e.pdf
    • https://static.usrfiles.com/ugd/b8c837_636df3f81567434b8f96819371890238.pdf
    • https://static.usrfiles.com/ugd/7c3584_e2f3d40ff55b4fb49ae140cd322510c5.pdf
    • https://cdn.shopify.com/s/files/1/0438/3883/2800/files/engineering_statistics_5th_edition_montgomery.pdf
    • https://cdn.shopify.com/s/files/1/0434/1130/8696/files/89941070534.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/xolusalutanufakozidineda.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/13199674787.pdf
    • https://cdn.shopify.com/s/files/1/0437/1592/0024/files/chromecast_pc_free_windows_10.pdf
    • https://static.usrfiles.com/ugd/b4609a_8f9c4b25030e49b286fc63343275f69d.pdf
    • https://static.usrfiles.com/ugd/162fe6_3ff634d70bfb4a94b68b1e99181bea09.pdf
    • https://static.usrfiles.com/ugd/db1da1_ce5eade10dd24e7fa7f5ed6f6cc7aaa2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b850ac65a99343d0a63973fbdcd63e80.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_off000054ae.bin
f24c4fcfd8bc2eb9c71dbc7d144ba6485bdcd226f2e4a54caf9a26c4434f113b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AE 5160 bytes
font_01_sfnt_off000065ff.bin
48c97a33f0c4794914728eecbbfaab4435813da132f3803b931c323165cb4821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FF 10088 bytes
font_02_sfnt_off00008882.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8882 4324 bytes

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