Malicious PDF — malware analysis report

Static analysis result for SHA-256 58773cb2978738ea…

MALICIOUS

PDF

41.7 KB Created: 2020-08-15 04:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 632c8f1fe282279229097d4fe3fbc3c9 SHA-1: 16b4c560bc4907936190535be611880b594915af SHA-256: 58773cb2978738ea0b47734c60fc1dbe4c808bff6a3a0821561376b4339fa56c
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Amazon kindle pdf convert' and includes the malicious URL. The presence of a 'download button' heuristic further supports the lure mechanism. The primary attack vector appears to be a phishing attempt using a deceptive link to redirect the user to malicious infrastructure.

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/wb?keyword=amazon%20kindle%20pdf%20convert
    • http://files.movie-season.com/uploads/1/3/1/8/131856743/d9ab73a8352a9.pdf
    • http://files.oneomatatime.com/uploads/1/3/2/6/132681391/4fcf6d73f.pdf
    • http://files.toyourjoyaromas.com/uploads/1/3/1/4/131453177/werosonifukoz.pdf
    • http://files.sambacostumeparis.com/uploads/1/3/1/4/131455463/sozugud-kubuxoxenotuvof.pdf
    • https://cdn.shopify.com/s/files/1/0431/0774/5958/files/bootstrap_vertical_center.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3418/files/likujixibarijavafozoxef.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/80743745491.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/important_vocabulary_english_to_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/ird_payment_slip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/8281703955.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/91432709181.pdf
    • https://cdn.shopify.com/s/files/1/0435/6151/7217/files/50646238111.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1469/files/62971055777.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/jabegexefab.pdf
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/63913964560.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/biology_chapter_7_cell_structure_and_function_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/catalogo_eudora_ciclo_9.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/introduction_biostatistics_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/0494/4807/files/vaniwen.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_off00006573.bin
bc4a9916651896e59619bc4b74abe0c62a9bbd2ce840396142138f019e04e8da
pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 5284 bytes
font_01_sfnt_off00007762.bin
4a24890ad567e95243443e87ebc83c9fa166c3dec38b7b3a71d98d2cfbc437ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7762 10024 bytes