Malicious PDF — malware analysis report

Static analysis result for SHA-256 17384a739a8208b0…

MALICIOUS

PDF

52.6 KB Created: 2020-09-05 00:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e60df5501223c76cc203871af1b96f23 SHA-1: 5be925b77fc1d311f914d69e8a9c15b5105aaf2b SHA-256: 17384a739a8208b017430f728ea525bd237780f419f63fe28deafc8acc455a4f
154 Risk Score

Malware Insights

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

The PDF contains a link farm of 30 external PDF files, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF URLs. This suggests the primary purpose is to redirect users to malicious content or to manipulate search engine results.

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/wix?keyword=best+airplane+simulator+games+for+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/1274/2564/files/dragon_mania_legends_battle.pdf
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/23939246576.pdf
    • https://cdn.shopify.com/s/files/1/0439/1924/5467/files/wow_classic_rogue_lockpicking_guide_horde.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1419/2285/files/xinejulufo.pdf
    • https://static.usrfiles.com/ugd/3ed902_3ad712378b0d4978a4da882922caa941.pdf
    • https://static.usrfiles.com/ugd/0286dd_2fe634fe67ab47f2b583d22ef6eb1ccb.pdf
    • https://static.usrfiles.com/ugd/738632_a74824e8dbfa4820a020c6f2e6c4f29c.pdf
    • https://static.usrfiles.com/ugd/cdfdba_42a2ca5f23f44f48a71e634622822dc6.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/tozolim.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6552/files/wave_interference_worksheet_answers_20._3.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/bukozos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40573574370.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/bromatologia_livro.pdf
    • https://cdn.shopify.com/s/files/1/0440/6955/2293/files/fade_in_screenwriting_software.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/15356914640.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/42661601566.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/hot_air_soldering_temperature_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/how_to_advertise_your_discord_server.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_off00008130.bin
ba4f7c8aea55d40f55ab895173ac5c10638f43e630683caf40125df6e1cf79d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8130 5292 bytes
font_01_sfnt_off00009310.bin
4e082940d49cc6cfa9938d8f37de93ac3ef823fd66e1f864bf54e6ba0904e89e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9310 10364 bytes
font_02_sfnt_off0000b68d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB68D 4324 bytes

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