Malicious PDF — malware analysis report

Static analysis result for SHA-256 617d1868dd78944d…

MALICIOUS

PDF

66.8 KB Created: 2020-08-29 01:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b2b7c6eaf4325c488da785b241745c1 SHA-1: 3eae8f4bcd9abfef96042412d00d025723f8a3f2 SHA-256: 617d1868dd78944d4e4936c539f0c7506a38cb577054b4a0f94ed08eba64896c
162 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL that is flagged as malicious, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'embird crack 2018' and a URL that appears to be part of a link farm, indicating a lure for potentially unwanted software. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=embird+crack+2018
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/sutilifizukeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/gelijidefodomobopog.pdf
    • https://cdn.shopify.com/s/files/1/0429/0894/2492/files/shotgun_reloading_data.pdf
    • https://cdn.shopify.com/s/files/1/0438/5033/4368/files/rujinenesefid.pdf
    • https://static.usrfiles.com/ugd/b8c837_906fbb18604e4936b0fe807f795e5f98.pdf
    • https://static.usrfiles.com/ugd/b8c837_83c5d557a7ab4480957e24a19e6cb8b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3865c41721046c88660cd18f848b0de.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c43be371d9f4088b4c8a2eaa1a6e6f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4e002446a084c3d89b6b51f2ee8b7d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e279ad5ada5a4ffcb3250b435ef5c171.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/perapadowokexupow.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/1985_nba_finals.pdf
    • https://cdn.shopify.com/s/files/1/0434/8130/1158/files/girlfriend_song_ringtone_bestwap.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_off0000b6ae.bin
3136bd705179b7b524518c34a2bf3ad8905952ed488fed46c897c3c991964c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6AE 3212 bytes
font_01_sfnt_off0000c22f.bin
4032d4963a4c00b530dfadf3a16b3a5003ba2c8c28737adc47fe2d231b57ccdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC22F 5556 bytes
font_02_sfnt_off0000d4fc.bin
f13be0b2597a8bffcfb1fe5814dbd6a7e60907ba80eca7c4b51d4f025feba0f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FC 12560 bytes

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