Malicious PDF — malware analysis report

Static analysis result for SHA-256 962c2fd7fc685b7b…

MALICIOUS

PDF

34.0 KB Created: 2020-08-31 00:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b6be6ec8302644f715468c92c17731f SHA-1: 6079a4e19b02fc765b13a1696a8662198a322d6b SHA-256: 962c2fd7fc685b7ba908ca4cb6fe2b21f0554cb53fe196d7be7b6971c71c27fc
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a manual for a popular air purifier, but it redirects to a malicious URL (https://ttraff.com/wix?keyword=mi+air+purifier+2s+manual+pdf). This indicates a social engineering tactic to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=mi+air+purifier+2s+manual+pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/dativifugedemo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/14143112891.pdf
    • https://cdn.shopify.com/s/files/1/0428/1345/6550/files/bisolikomatekubule.pdf
    • https://static.usrfiles.com/ugd/b8c837_81dc683b970c48aca77afce710b8cbcd.pdf
    • https://static.usrfiles.com/ugd/d162e3_48c6e09781a544c5b6986007e9fbaaa8.pdf
    • https://static.usrfiles.com/ugd/99965f_08e9182f18fa49a79e630d4913cfb14b.pdf
    • https://static.usrfiles.com/ugd/136d07_234020b014bc47438653ae85e24aef45.pdf
    • https://static.usrfiles.com/ugd/8b9728_aa36620fe9724ffdb447c43f119192a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e32734075e9409abeaa4780a30b8d12.pdf
    • https://static.usrfiles.com/ugd/738632_b3d7c1d85c354ff58acb43043956cf4a.pdf
    • https://static.usrfiles.com/ugd/03ae60_29c8f03863044f8a8ce628b72f7ad0e8.pdf
    • https://cdn.shopify.com/s/files/1/0438/6104/9494/files/pamiliwajadup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/serivuxepe.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/cbse_class_10_board_exam_date_sheet_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/i_am_discourses.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046f0.bin
d14d64c34f0ddcf3ded9cb15fac8afc2e96b06c835ac2cfd527b06be4f465037
pdf-font-stream PDF embedded font (sfnt) at offset 0x46F0 5324 bytes
font_01_sfnt_off000058fd.bin
e45811e50525ef42b30ec99379e366c858c72d43adc722a79e47704ae1a3cc30
pdf-font-stream PDF embedded font (sfnt) at offset 0x58FD 10024 bytes