Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69736293c1103a8…

MALICIOUS

PDF

49.8 KB Created: 2020-09-04 08:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7b5476663aa90f237db02ab9ec462a8 SHA-1: 00363c833abeadf0e1d6f1b014284d0de82d686f SHA-256: b69736293c1103a84a8c79a30f07d409ef5f639f289312a1807d446b76f78aa2
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=celestron+cgx-+l+manual'. The document body, though heavily obfuscated, contains text that appears to be a lure related to a Celestron CGX-L manual. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to the malicious redirector. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=celestron+cgx-+l+manual
    • https://cdn.shopify.com/s/files/1/0439/5175/1336/files/66649900888.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/pibilanurovelupipelawe.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/17761880299.pdf
    • https://static.usrfiles.com/ugd/6cf392_073782c0ee5e4de4a49638ced28a5535.pdf
    • https://static.usrfiles.com/ugd/b8c837_3660a2cb9bf04d14a9ef227cb72b6c90.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_b4874ddc82a140f7add223092f923049.pdf
    • https://static.usrfiles.com/ugd/debbe1_831d818ef1f8411f821c0504ecfc2e83.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/robidu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4158/5314/files/dae_to_obj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/vidifesasijotawukiwisak.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/bipagizuduvivizizexejadu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/band_of_brothers_theme_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/8980/3941/files/18199915979.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1098/files/zibivose.pdf
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/98725972900.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/aspen_plus_examples.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/blank_birthday_gift_certificate_template_free.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_off0000711e.bin
aae8700dc3f82ed02e9b3d8843ad2a81c137386f717982beda29cbafea22295d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711E 3080 bytes
font_01_sfnt_off00007c26.bin
3dee55b2af29f40d29536ea69cec0bddc6f624dbc117a32564f2c24539446402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C26 5124 bytes
font_02_sfnt_off00008d86.bin
0d38ad5b4af9cc5ae0b618dcf0130c7442af8aac9c729c1715b5475aad094ea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D86 13904 bytes

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