Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa024e5a3dbcbd5…

MALICIOUS

PDF

48.6 KB Created: 2020-09-07 23:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8992bbc6112f290fc7bf47c1dc1800d9 SHA-1: c2f92d894c815901eda1c6a83425d0a2e7f7368f SHA-256: eaa024e5a3dbcbd5e69be39e06c8211a92d7695cb91f5cba75f7e0d473c8c7c5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.me/wix?keyword=jobs+worksheets+for+esl+students'. The document body, though heavily obfuscated, contains text fragments related to jobs and worksheets, likely intended as a lure. The file also contains a large number of external PDF links, many hosted on shopify.com, suggesting a link farm or SEO poisoning tactic to distribute the malicious redirector.

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.me/wix?keyword=jobs+worksheets+for+esl+students
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/algorithms_robert_sedgewick_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/64889823016.pdf
    • https://cdn.shopify.com/s/files/1/0467/9709/5061/files/sample_canadian_tourist_visa_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3462/files/pdf_file_editor_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/fitikogasatuzu.pdf
    • https://cdn.shopify.com/s/files/1/0457/6722/9606/files/opera_browser_with_free_vpn_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/microsoft_word_resume_template_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/mirimamoberiwuvajuva.pdf
    • https://cdn.shopify.com/s/files/1/0440/6280/2085/files/bozagepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/65962291537.pdf
    • https://cdn.shopify.com/s/files/1/0433/5242/4598/files/bharti_airtel_annual_report_2018-_19.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3884/files/bengali_new_movie_villain_hd.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/jefamijurefiludom.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/autocad_2018_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/texedemugapa.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_off000080a2.bin
932974e403b543754aff72d240a90058c41b6b06698e62a3aae88e62aef6710a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A2 5068 bytes
font_01_sfnt_off000091ea.bin
01369be13110e307a92afbb0fc11ef9e4a0e33f43485bb5e97d51d149f1e821b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91EA 11104 bytes

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