Malicious PDF — malware analysis report

Static analysis result for SHA-256 736d384e2ff189a3…

MALICIOUS

PDF

53.5 KB Created: 2020-09-08 08:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b397a407e3e37bf81675e760985a9cba SHA-1: 4f18b536c1663d9d342bdfdbbdbd0d3b99fcb382 SHA-256: 736d384e2ff189a3dfa6e7814d7fbbc01fa88cbfda20b749ecedd313d2db16e6
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Cyborg superman vs android 17', directing the user to the malicious URL. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt 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.club/pify?keyword=cyborg+superman+vs+android+17
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/2273397474.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/momexul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/jumujefojiva.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/zetakipuwifikirimatig.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/3232005825.pdf
    • https://static.usrfiles.com/ugd/b8c837_28809952fede4e4fb7c3d8468397f802.pdf
    • https://static.usrfiles.com/ugd/c0b427_db839c2e8aa441c3adb1af07a6338f9d.pdf
    • https://static.usrfiles.com/ugd/1813b3_84a102bb3374493a913032e212b32f04.pdf
    • https://static.usrfiles.com/ugd/b8c837_9585a4372f034e088ff4e54519a577d5.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_ba6f7734dea748f79b5e51c6c0c4d1fa.pdf
    • https://static.usrfiles.com/ugd/e8506d_34c369cea1f9438d8a7a8ab0c548cfc4.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/babinukobefalekawefetolo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/you_raise_me_up_sheet_music_vocal.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/siroserabifamirofos.pdf
    • http://en.wikipedia.org/wiki
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091f8.bin
015a71ba90857fa82d2e7b449038bde5e5d49f3d6322b48b01934a08219b3e47
pdf-font-stream PDF embedded font (sfnt) at offset 0x91F8 5584 bytes
font_01_sfnt_off0000a4f1.bin
cc7c7e4cc5e14ecc225a16960e449ccd2f7e27e05050b2afee3f59edea9fd7a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F1 10524 bytes