Malicious PDF — malware analysis report

Static analysis result for SHA-256 4435b854c49caaff…

MALICIOUS

PDF

40.5 KB Created: 2020-08-25 09:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee7f17cbe48696d7f1e53fdcf784bbf0 SHA-1: 2a7cfc17d3bad65287793209be2beac8fb1fd3cb SHA-256: 4435b854c49caaffc593fab7281ff93222998f275fa9f3a11522cf389e2b7e83
130 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'learn english free printable worksheets' and a URL pointing to a redirector. This suggests a social engineering lure to drive traffic to malicious sites, likely for further exploitation or malware delivery.

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=learn+english+free+printable+worksheets
    • http://files.jameslpoole.com/uploads/1/3/0/8/130873769/zuginumaxaji.pdf
    • http://pawuwez.cantonohiolandscaping.com/uploads/1/3/0/7/130776321/3998718.pdf
    • http://tadijaka.chesapeakeorchestra.org/uploads/1/3/1/4/131452938/4114670.pdf
    • http://kuzaweta.abocomix.com/uploads/1/3/1/4/131408022/3089627.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/14529362131.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/tamibunubuxagotujegikuv.pdf
    • https://cdn.shopify.com/s/files/1/0443/4529/5004/files/28091629966.pdf
    • https://cdn.shopify.com/s/files/1/0437/2352/2216/files/w_b_c_full_form_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4112/6565/files/lazudulitogife.pdf
    • https://cdn.shopify.com/s/files/1/0434/3981/6861/files/tabobikasanozi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3032/8997/files/37321087699.pdf
    • https://cdn.shopify.com/s/files/1/0433/4983/5930/files/gilakululalomepa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/ahk_auto_clicker.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/calculus_of_variations_springer.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/45768703753.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/jedasevo.pdf
    • https://cdn.shopify.com/s/files/1/0459/0531/3946/files/41713116566.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/zakolim.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_off00006009.bin
a64617314dc29758f98e0c00bd9bc47b3aede6c471e4fc63b85b94c19d296669
pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 5400 bytes
font_01_sfnt_off00007276.bin
8d93c0251939764f02763f920118c5b55c2974cc8525296b2d6c514e73b53b2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7276 10080 bytes