Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddcd953c06ca54e1…

MALICIOUS

PDF

39.6 KB Created: 2020-09-01 03:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c39b2209ca62b8d88a3b8ed29bcf898a SHA-1: a8e0dae84adb0fe9130db494b234bd91bc568395 SHA-256: ddcd953c06ca54e106d97d6c0985d39ec68eec104b27dd15db54f57a643253d9
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=free+albums+android+apps'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure for free albums or Android apps, aiming to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=free+albums+android+apps
    • https://cdn.shopify.com/s/files/1/0431/6371/3695/files/68181757980.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/saxon_algebra_2_online_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/6916/9054/files/refox_download_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/mariage_d_amour_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9277/files/winrar_latest_version_64_bit_crack.pdf
    • https://cdn.shopify.com/s/files/1/0431/1010/5244/files/afrikaans_english_dictionary_free.pdf
    • https://static.usrfiles.com/ugd/48d9a1_27f930c688aa4b6bb2fada3cb643d3b1.pdf
    • https://static.usrfiles.com/ugd/895bef_7dc8c769e6d74f1ba534a721c561784f.pdf
    • https://static.usrfiles.com/ugd/48d9a1_3376f7dcde95468db7039f10853400bc.pdf
    • https://static.usrfiles.com/ugd/3aee12_4474eb9379734e1a9cee6c27a774b2a6.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/57017483398.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/gegedorigor.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/lcm_hcf_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/62303589708.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_off00005e5c.bin
bc19dd20a1d6971b971d1a70a1af22d85923f95d25d62b8a8496aee9c970bdbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5C 5200 bytes
font_01_sfnt_off00006fe9.bin
405e0c97cab8b6163df05771c233475499974f461d8aac946dfbe261215057a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE9 9924 bytes

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