Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b30410cc9281b8…

MALICIOUS

PDF

54.4 KB Created: 2020-08-25 10:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f5eb25eebd08a986c3f897ee40ada8a SHA-1: 10de3f8a6b5d37411cdaec66f4aa434aa4793859 SHA-256: 55b30410cc9281b822e4903db0b3ad1721325e848945e5d2c8624d3edbed8a87
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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.com/pify?keyword=current+affairs+2018-+19+questions+and+answers
    • http://files.moldingconfidentme.net/uploads/1/3/2/6/132695478/5638472.pdf
    • http://zelubub.rochesternyaadom.org/uploads/1/3/1/8/131856427/bilumodike-memajen-xijen-xifuzadagaxib.pdf
    • http://dadud.dev.moabgear.com/uploads/1/3/1/3/131379578/4667906.pdf
    • https://cdn.shopify.com/s/files/1/0434/3054/3512/files/43895389129.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/92918228030.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/mimexurozujoziloradeg.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/32673415827.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/61018710720.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/79086372433.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/kudejubifuvovesezesug.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/word_meaning_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1577/files/naruto_shippuden_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0459/9844/0605/files/boost_converter_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/demija.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/finance_journal_articles.pdf
    • https://cdn.shopify.com/s/files/1/0434/4171/7414/files/pdf_to_word_converter_mobile_app_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070a9.bin
972dba7b0e596cac5ee43582899c8aec1b02929286d25551890601b2dabe955b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 5700 bytes
font_01_sfnt_off0000842c.bin
92d2e4efbfde8f54c7b52704d575ed94e830ac04b0a376a225253c11c048808a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x842C 10552 bytes
font_02_sfnt_off0000a83c.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA83C 16164 bytes
font_03_sfnt_off0000bd51.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD51 4324 bytes

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