Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1d14513aaa8a49…

MALICIOUS

PDF

48.4 KB Created: 2020-08-13 02:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fdca0005eba02f0089c172f68353b20 SHA-1: 756821676f6001973d4146f660afa52fad24274b SHA-256: ab1d14513aaa8a493890b8a378d099d450fa4d20045c8e4693583218bb4fc187
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with one critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ca course details pdf' and includes the malicious URL. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

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.com/pify?keyword=ca+course+details+pdf
    • http://wazixug.nimblenotesmusic.com/uploads/1/3/0/8/130814124/78c3f64e1b.pdf
    • http://files.erikaschool.com/uploads/1/3/1/4/131406430/babezakivid.pdf
    • http://files.dialyzermedicals.com/uploads/1/3/0/7/130775363/6350989.pdf
    • http://files.ztodorova.net/uploads/1/3/1/8/131856672/79bf8fd84fcb.pdf
    • http://files.abideministryofarlington.org/uploads/1/3/0/9/130969817/piworamum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/apple_store_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/gafugoxudanizasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/76730399475.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/79379615048.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/bovewusojekibasa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/wordpress_library.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/christian_boy_baby_names_in_tamil_font.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/3442773976.pdf
    • https://cdn.shopify.com/s/files/1/0428/5385/9494/files/agri_fab_lawn_vacuum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6241/7825/files/lewuzaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/riwekalimuvini.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/mokopuwepiwuvab.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/27972522353.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0536/files/9052200234.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/wugonupo.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_off0000803a.bin
630f95374c7b421bb4f133b925e289e6c9d58a0091ef7ebd3ac67496fa7d3a59
pdf-font-stream PDF embedded font (sfnt) at offset 0x803A 5052 bytes
font_01_sfnt_off00009173.bin
a14a3b06b282c446948363f50bf016c650e8e9cfc3d64489b52db5975ae5e427
pdf-font-stream PDF embedded font (sfnt) at offset 0x9173 10244 bytes