Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d87fccd0cae606d…

MALICIOUS

PDF

42.2 KB Created: 2020-08-11 15:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34b61d802e9ed543e27b046aff897cc5 SHA-1: d1c9ee05dee39de0879844a41d46908491026945 SHA-256: 2d87fccd0cae606d7e2aec1583fbcce1d25bd1b7ba56f006f04cd5fa217e3148
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=princeton+blockchain+book+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on shopify.com. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking title, suggesting a lure to download potentially malicious content. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=princeton+blockchain+book+pdf
    • http://files.americaninfousa.net/uploads/1/3/1/3/131383478/vimufixoze_tidumaroxerisaw_xomibibi_sefurikot.pdf
    • http://files.rarebreednationllc.org/uploads/1/3/0/7/130740504/3bc46ae.pdf
    • http://files.burlingtonedisonlittleleague.com/uploads/1/3/1/3/131381428/4846565.pdf
    • http://files.mrizzo1964.com/uploads/1/3/0/9/130969600/d3f88a1c3.pdf
    • http://garegaj.signsof.com.au/uploads/1/3/2/3/132303245/kegojusugogoli.pdf
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/zisupogonu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/jodotuxuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0360/0283/files/49691173702.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/bricks_beads_and_bones_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5371/9453/files/milofolisavugoki.pdf
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/present_simple_and_continuous_exercises_easy.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/the_onion_book_of_known_knowledge.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/nusosiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/civil_drafting_technology_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6222/3263/files/zafefom.pdf
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/71104541159.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1871/files/sakawoxokejuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/zibikegaxa.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_off00006618.bin
673196f2fdd1679b510be9901adf44943d983f6fa1b35c550b4494a74e75fff8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6618 5272 bytes
font_01_sfnt_off000077e1.bin
31f95644fa115a6361f613748b6287ecb478e7ca5db7482d55d6e253d1f164ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E1 10504 bytes