Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbd8e593f95e7a6…

MALICIOUS

PDF

39.1 KB Created: 2020-09-01 01:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 231310e5d85014ec299a445e2a8c77b9 SHA-1: 4585e50255c24343de08b40050ee199a6bf0227c SHA-256: 2dbd8e593f95e7a6766f0b8a2a891889f89ed9049b743e14a37ddfc2f384c489
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a critical heuristic for containing a link to a known malicious redirector, ttraff.cc. Additionally, it contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or distribution mechanism. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the redirector URL, reinforcing the malicious intent.

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/pify?keyword=all+unicorn+dropper+bottles+mockup+free
    • https://static.usrfiles.com/ugd/c8a981_038f5e427cda43b9aa1435afb4ec38d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c832d220f17643b9b1c72a2132dd6682.pdf
    • https://static.usrfiles.com/ugd/90423f_b0f0d56fb98c499a810d791ce67ab17f.pdf
    • https://static.usrfiles.com/ugd/96768c_54401e8c7ba544879e6acfedfc58c74a.pdf
    • https://static.usrfiles.com/ugd/9cb927_677d788d390549d098da254d98f0084a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/ala_baburao_dj_song_wapwon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/enhancement_shaman_vanilla_pve_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12035000993.pdf
    • https://cdn.shopify.com/s/files/1/0461/0939/3059/files/picsart_background_wallpaper_hd.pdf
    • https://cdn.shopify.com/s/files/1/0432/7751/6955/files/mabedatobatofebuzekemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/cours_japonais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0437/6277/8264/files/burton_swim_shorts_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/kexubigatikodifide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8312/9251/files/nosedagugaxovelogagelaf.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_off00004e6f.bin
8d7b98841d1fdc683ab4d3231597283a25e69a1e0de9474cc1062b185c4c3673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E6F 5164 bytes
font_01_sfnt_off00005fd9.bin
647e2a67658c37c91abdeb284d346f64a1651b72d6ca99cf538eb3fa6cde7913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD9 9836 bytes
font_02_sfnt_off0000818f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818F 4324 bytes

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