Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf0bc2ef69cd722…

MALICIOUS

PDF

62.9 KB Created: 2020-08-31 00:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ced0e136d7ef32c6b1e87b9e82ccbe4 SHA-1: 92e5e2eb3d8a1832dab9c519517f075a11fc8661 SHA-256: aaf0bc2ef69cd722a99f18b3c02cc2b494af4a143d09789481e627db93b9255e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/wix?keyword=diff%25C3%25A9rents+types+de+m%25C3%25A9moire+visuelle`. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, many hosted on `static.usrfiles.com`. The document body, though partially garbled, contains the same malicious URL and benign-looking PDF links, suggesting a lure to engage the user. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=diff%25C3%25A9rents+types+de+m%25C3%25A9moire+visuelle
    • https://static.usrfiles.com/ugd/63022f_366d9509979747a681e0166fe2b02961.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_f3456abcfadc437da2a4881697fdb5c4.pdf
    • https://static.usrfiles.com/ugd/8a419d_2905b9aa0399442a902ce6330456c56a.pdf
    • https://static.usrfiles.com/ugd/ab922d_5fc92992346e45b3aae2402a5582bbcb.pdf
    • https://cdn.shopify.com/s/files/1/0437/9462/8769/files/public_policy_analysis_national_open_university.pdf
    • https://cdn.shopify.com/s/files/1/0440/1109/4174/files/sivexenugegorejuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/tufilipipikinunagajebuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/tigivorodijijan.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/56137930195.pdf
    • https://static.usrfiles.com/ugd/ec0c41_bb765353bc514334958fbb6b980e2df4.pdf
    • https://static.usrfiles.com/ugd/70a38d_d3c54410dcbe48a3b230f64cbb288ae0.pdf
    • https://static.usrfiles.com/ugd/2f7815_943a2adb7efe44b68b633e77d090e5e3.pdf
    • https://static.usrfiles.com/ugd/1d64af_f80e5a90a3be4150bb7a2ea89bf9d7fd.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069be.bin
257043a8ab6b81859e721dff54c68a7e944a2d79d8cefca898da2e0b213e3792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BE 5160 bytes
font_01_sfnt_off00007afc.bin
3748df364b1f279134a3068bed029e109bbfd9cb39d8f29e133a34a2318ca749		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 12228 bytes
font_02_sfnt_off00009834.bin
e95604e69cc075e8243d01f00660f31073cb346a8324c2ed14345589e1893f14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9834 11920 bytes
font_03_sfnt_off0000be00.bin
a8abf55dd2e8740c1a6f190faf73ec17266ee6b015a8215426bf192d3f0417c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE00 16828 bytes
font_04_sfnt_off0000d584.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD584 4324 bytes
font_05_sfnt_off0000e338.bin
f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 1736 bytes

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