Malicious PDF — malware analysis report

Static analysis result for SHA-256 72188290bd92e9cb…

MALICIOUS

PDF

40.8 KB Created: 2020-08-06 13:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8911cd31b258bb3655a18014eb722fc SHA-1: ae40ba3cc50da04846865e76b27ada811b0d1f79 SHA-256: 72188290bd92e9cb2a4edf098d2fda527a2a4a59f6ef9283177ca2b3132f9dbe
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious content. The document also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a malicious intent to redirect users to harmful content.

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.com/pify?keyword=amada+bending+machine+pdf
    • http://files.mylearninginwolfcreek.ca/uploads/1/3/2/6/132681219/fobufuru.pdf
    • http://bopale.ntspruikle.com/uploads/1/3/1/8/131856772/mijufekanuzovu.pdf
    • http://files.naturecoastdecorativeartists.com/uploads/1/3/1/6/131606035/8416c9e4bb.pdf
    • http://taroged.grotonalliance.org/uploads/1/3/1/0/131070718/3b0ba0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0433/2548/9320/files/56614914368.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/automotive_technician_resume.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/84640253257.pdf
    • https://cdn.shopify.com/s/files/1/0434/5741/3270/files/kegefumibabewematu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7460/7514/files/zegapidemoledoxesixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7627/2796/files/zorajalagubetujujukife.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/hollywood_hd_video_song_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/latotexuzovevoxejew.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/zuxafemif.pdf
    • https://cdn.shopify.com/s/files/1/0435/3451/6376/files/74952727205.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0398/files/fuxesadajajatatanaxokeb.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004835.bin
7e519a60780515144b4db408907245e1795ef8b17731d0f387be142bd054487f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4835 5392 bytes
font_01_sfnt_off00005a5e.bin
e1c883cb1db6237636f0e83ccb5a7cb45e4f279d5d351f241f190ab71248f324		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5E 9400 bytes
font_02_sfnt_off000074db.bin
acfae52b7f22560456d834dd261362143ae6c26be7156f5d11b5f8d189c79c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DB 9820 bytes

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