Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59dd1bd3b6acc94…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 09:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8628708383992b5508c508f8a278322c SHA-1: 48a68fa3ae0126fc9b18a9eaa514833f2369c2c5 SHA-256: a59dd1bd3b6acc9439c27845d241283726c49d7316541ecf21e8027e635b1001
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to 'reply to group text on android' and a URL pointing to a malicious redirector. This suggests a phishing or social engineering attack aiming to direct users to malicious content.

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.ru/pify?keyword=reply+to+group+text+on+android
    • http://xatatewej.citizensforcivicrenewal.org/uploads/1/3/1/3/131383434/1633988.pdf
    • http://jibivos.carpetcleaningstpete.com/uploads/1/3/0/7/130738948/zikuvunowimabafasor.pdf
    • http://farilonil.kemiesho.com/uploads/1/3/0/8/130874030/9166673.pdf
    • http://fedik.centrallouisianaorchidsociety.org/uploads/1/3/0/9/130969176/wixifijatote.pdf
    • http://files.claireallegrataylor.com/uploads/1/3/0/7/130738971/zugoxejomazoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/illinois_cosmetology_test_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1743/6327/files/40987748088.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/rejavugowalogive.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/wifinoxofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/xuwutabomupekazupos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/raripilabaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2711/files/53186524114.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/nolumok.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/pdf_robotica_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0437/2470/1845/files/gedirigekimotalozoled.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7727/files/how_do_you_convert_to_word_document_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/96843196803.pdf
    • https://cdn.shopify.com/s/files/1/0434/5243/2537/files/android_sdk_install_on_mac.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_off00006140.bin
3c8d791f6a04f87483e4e139a6239fa1eb6f7c7a1303f7fd933fdc3b5371568f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6140 5128 bytes
font_01_sfnt_off000072d4.bin
9352b8582ba7f8cc09e77707c5439192252795dbeaf9358643ebcde6df91bfcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D4 10808 bytes