Malicious PDF — malware analysis report

Static analysis result for SHA-256 655a7053b3838db5…

MALICIOUS

PDF

85.6 KB Created: 2020-09-07 07:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35563994e0948584f7289628107ee25f SHA-1: 2cd0b32949c26e0862285aad16b8b5c3161484b6 SHA-256: 655a7053b3838db5fdc60896b9a06b163d44084c9bd802fc2d653d30693acd58
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a link to a known malicious redirector, ttraff.cc, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to a "Directv freeform channel guide", suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links also indicates a link farm, potentially for SEO manipulation or 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.cc/wix?keyword=directv+freeform+channel+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5735/6695/files/ensefalopati_dengue_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0437/3187/8049/files/the_adventures_of_huckleberry_finn_abridged.pdf
    • https://cdn.shopify.com/s/files/1/0465/0142/9406/files/grade_9_math_worksheets_printable.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/60818890014.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/garden_answers_plant_identification_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/7798/2626/files/fetenujejos.pdf
    • https://static.usrfiles.com/ugd/afe78f_4d88d9dfe0d7494a824e5d4a3d252d67.pdf
    • https://static.usrfiles.com/ugd/111c46_515ca357ef2547a49a2088da19eff907.pdf
    • https://static.usrfiles.com/ugd/b8c837_5769e1b7c6f04deabef1f2ef0e60a801.pdf
    • https://static.usrfiles.com/ugd/8acad3_0a7a48fcabb642b2aa33714e4d164faf.pdf
    • https://static.usrfiles.com/ugd/c6ac46_e7cea708103445519d3b6311673c4145.pdf
    • https://static.usrfiles.com/ugd/5de1df_7a8c607e536b438c866c9d180d735f0e.pdf
    • https://static.usrfiles.com/ugd/50c35f_85b2dc3a78e64f05a1ddde1d27606888.pdf
    • https://static.usrfiles.com/ugd/23e9be_a71f50353d6d46ec8e26404b027f3b63.pdf
    • https://static.usrfiles.com/ugd/5cf23b_aabc049301784385b337680f8b5eb8f0.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb86.bin
14cb67d2341f6613b31e73575ef0cf84979bd4f8a7d9bcca31e6515a33171c3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 5196 bytes
font_01_sfnt_off00010d10.bin
e0090891df4e5734e185f0bf12ce3cb25c8e2be0a3d9dbd886af67361c6375a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D10 14352 bytes
font_02_sfnt_off00013af7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF7 4324 bytes

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