Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96f26ee158f19db…

MALICIOUS

PDF

79.4 KB Created: 2020-09-08 00:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca041f04c82ba09edb3f476c46c0c2a2 SHA-1: dbd16a24d75c9066621b78a925b93d465f2eab95 SHA-256: a96f26ee158f19db0085620f6b67bae88a3c9b39534ec850d002fb8b0b746ff4
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=changeling+the+lost+rulebook+pdf'. This URL is presented as a download for a rulebook, indicating a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious URL embedded within the document.

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.me/wix?keyword=changeling+the+lost+rulebook+pdf
    • https://static.usrfiles.com/ugd/3649d2_487a8ebd1d9c42a69873beb08ee019af.pdf
    • https://static.usrfiles.com/ugd/a59130_82e02ada0fbc4b5fb9a5c5257d19caa0.pdf
    • https://static.usrfiles.com/ugd/13ae68_d3e650b1ff8c4b4fa0cba2623c7f9aec.pdf
    • https://static.usrfiles.com/ugd/a7074a_0d3bd79d5276425bb00c1d8b67cfb975.pdf
    • https://static.usrfiles.com/ugd/368de4_495ef45459164d0f8960d91ecc33c19e.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0021/files/zitigeku.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/60142002205.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/rigodotovogipiwezuku.pdf
    • https://cdn.shopify.com/s/files/1/0438/0511/4528/files/adagio_for_strings_arrangement.pdf
    • https://cdn.shopify.com/s/files/1/0434/7533/7368/files/the_real_book_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/12978379106.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/84976701596.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/tolutetimelul.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0725/files/73525781991.pdf
    • https://cdn.shopify.com/s/files/1/0435/4578/8565/files/1602471721.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
    • https://cdn.shopify.com/s/files/1/0448/6037/5201/files/briggs_and_stratton_parts_by_serial_number.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_off0000ecc1.bin
c790dc6da33a16b8a808f43310f2f59cea4e2dd08051568dc02c0849fb7a3f2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 5412 bytes
font_01_sfnt_off0000ff13.bin
c72aa3890286563efcd344cdee40e861eb2b71bdbec089d89ce7ca77094b276b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 10192 bytes
font_02_sfnt_off000121e6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121E6 4324 bytes

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