Malicious PDF — malware analysis report

Static analysis result for SHA-256 8248d96676a080d4…

MALICIOUS

PDF

47.8 KB Created: 2020-09-02 03:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 855bd24144a78b1cb1e56aca3e658b63 SHA-1: 05df28a004d3467b59e800fbaf2f85175a841ca4 SHA-256: 8248d96676a080d49805ee7f7bdcd0fec2d5943a02ec6fd128f31a010b6a4ac4
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'antivirus apk android' and a URL that redirects to a similar query. This suggests a lure to download malicious software. The primary malicious IOC is the redirector URL, which is likely the entry point to the attack.

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.link/pify?keyword=antivirus+apk+android
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kebiwubinixakagaxirefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/77383371419.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61053474184.pdf
    • https://cdn.shopify.com/s/files/1/0435/5011/3943/files/al_quran_terjemahan_kemenag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2322/files/47860244735.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/nowezaror.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/44903257508.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/desosaloniwirogeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/3274/7927/files/allahabad_university_llm_entrance_exam_model_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/12871039784.pdf
    • https://static.usrfiles.com/ugd/234f58_0a455e3ed71b420fa481b984b0d7fd1b.pdf
    • https://static.usrfiles.com/ugd/d5415a_d0668c92aa9a48159283e79bb06445cc.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6018/files/underscore._js_sum_value.pdf
    • https://cdn.shopify.com/s/files/1/0461/3491/9321/files/51316994874.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/xibinesetos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/vozijukubodewofuro.pdf
    • https://cdn.shopify.com/s/files/1/0452/2328/0800/files/xamuwipurida.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000705c.bin
5164e054f5948f03ae98e690b6cddb2d6362b6a77479a8e45cd308bc1d89c623
pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 4796 bytes
font_01_sfnt_off000080b0.bin
b9b124435ae1e5efcabe809c0c1eac38021cd8aaaf49e86d27fae5ddbb59890b
pdf-font-stream PDF embedded font (sfnt) at offset 0x80B0 10424 bytes
font_02_sfnt_off0000a40d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA40D 4324 bytes