Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cc1936d27a3c05…

MALICIOUS

PDF

67.0 KB Created: 2020-08-31 06:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf3df2cac9760fd94da4d6b330b72c12 SHA-1: b0b7f9f3957993ee9670d6019ccaaabedb71c82d SHA-256: 85cc1936d27a3c05f8d07d6342bb32432335e602616f4ec6981b42eec6b464c4
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. The document body text, though partially garbled, includes a lure related to 'the fault in our stars arab' and the malicious URL itself. This suggests a phishing or social engineering attack aiming to redirect users to 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.cc/wix?keyword=download+the+fault+in+our+stars+arab
    • https://static.usrfiles.com/ugd/f967ac_2d352005ebc64c9f9ac06ac5f95b6bb6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b03a392f0c864f339b26f3c3b6d0a86f.pdf
    • https://static.usrfiles.com/ugd/590778_a18804a0d42348ebbecc17c3d82931ed.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/eaton_cad_files.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/shayari_by_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/39976349948.pdf
    • https://static.usrfiles.com/ugd/0a0016_ae2b74b6cbd4474aa23cebf32de6fe0c.pdf
    • https://static.usrfiles.com/ugd/c0b427_483a017aea974218a26b63d3293a1f77.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/zudebupikasod.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/10282643101.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/najakafuterazesiledajo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6059/9711/files/sims_4_sexy_clothing.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/20719334007.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000ce6d.bin
cb5ea346908bff7ae92d38a49335bc7d9ab2f4844957a32741aa74859c822bf7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCE6D 20500 bytes
font_00_sfnt_off00005ab4.bin
e76f77ec467013d4340685b59fd018de04a65c916d97c82e61e16f52279330bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB4 15544 bytes
font_01_sfnt_off00008c85.bin
ea1dbe3ce8464dc16cb5dd2857ac22b6db23a0f94273a5023f140c494d79e409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C85 5108 bytes
font_02_sfnt_off00009de3.bin
102b74a2d5a1cf1406834bb2a323b86e39536b7d4eb39ffb0729a0ddfdd86890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE3 15568 bytes
font_04_sfnt_off0000f026.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF026 4324 bytes

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