Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a020cbcc0936d24…

MALICIOUS

PDF

44.9 KB Created: 2020-08-15 08:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83fc4d5e4c2df139d06b3ddb0aec070b SHA-1: fc59751b2a387d1fe6a76177a7b224c0e5ac70c4 SHA-256: 2a020cbcc0936d24016198a991036f72ad70fb2dafe0015349a363266324f2da
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=opera+mini+browser+free++cnet'. This URL is presented within the document body, disguised as a download for 'Opera mini browser free cnet', and is likely intended to lead the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, further suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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.cc/pify?keyword=opera+mini+browser+free++cnet
    • http://files.kreationsbykarenjewels.com/uploads/1/3/2/7/132740978/benufijiputegevudut.pdf
    • http://files.racepartsliquidators.com/uploads/1/3/1/6/131636914/takipisot.pdf
    • http://files.katrinaleelifecoaching.com/uploads/1/3/1/6/131607029/vixezaz_mubujaziranide_ziwogomexozub_semidibajek.pdf
    • http://faram.kloveday.com/uploads/1/3/2/6/132681579/720018.pdf
    • http://files.angelafree.org/uploads/1/3/0/7/130740625/5029680.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/xobin.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/ladiku.pdf
    • https://cdn.shopify.com/s/files/1/0428/7794/3967/files/bewor.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/american_cinematographer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/17054714682.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/22550408828.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/27055123736.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/44447300891.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/28789818398.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/wututeparuzipobokitemum.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/sdlc_waterfall_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/69747602230.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_off00006639.bin
8d8b67ff1422cc20b45b343614086c383784f10a04b8b4e3cff56e86084968ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6639 5176 bytes
font_01_sfnt_off000077b3.bin
1729bc1c9b97714fb0c38fa2909be8d58ba926031830cc04f1fdfd619c03d3ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x77B3 9620 bytes
font_02_sfnt_off00009886.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9886 4324 bytes