Malicious PDF — malware analysis report

Static analysis result for SHA-256 049da9c23d523081…

MALICIOUS

PDF

54.1 KB Created: 2020-09-04 21:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8c05f977da7561371fbc7d85b90f25b SHA-1: e1cab1ec9c77af9a331395e203b1691b0317de54 SHA-256: 049da9c23d5230813f1b60467bcca5a5f421b4afc762934f1b71135449a29f33
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector. The document body, though partially corrupted, mentions 'Google sheets templates calendar 2019' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links also indicates a link farm, likely for SEO manipulation or to distribute further malicious 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.club/wix?keyword=google+sheets+templates+calendar+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/10982060003.pdf
    • https://cdn.shopify.com/s/files/1/0436/7056/9113/files/cinderella_man_questions_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/5658563460.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/38577057314.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/lavijatefaluvufel.pdf
    • https://cdn.shopify.com/s/files/1/0437/4410/0506/files/tidogaf.pdf
    • https://cdn.shopify.com/s/files/1/0449/7879/8750/files/alleluja_mio_twa_nuty.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/vertebral_column_labeling_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/ceremonial_magic_and_the_power_of_evocation.pdf
    • https://cdn.shopify.com/s/files/1/0440/4799/0934/files/android_studio_emulator_not_showing_my_app.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_off00008644.bin
1bc0dde4503a35df6756f013984db2b3ae364984a5b63be90ca60f8800f6f41e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8644 5740 bytes
font_01_sfnt_off000099af.bin
2a85169d94273336d612c17ce1ad9ab854b718dc0ce8ab98c20fb4f51acfb6df
pdf-font-stream PDF embedded font (sfnt) at offset 0x99AF 10824 bytes
font_02_sfnt_off0000bdef.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEF 4324 bytes