Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae96218eea1ba43…

MALICIOUS

PDF

43.2 KB Created: 2020-08-27 15:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5c1c29b4eaf17a4689892cc1df17c84 SHA-1: 7349e5fa1dac1ad4d6d5de58330f5a8071150df5 SHA-256: fae96218eea1ba43a33eeca4351196536c2aba09da9dc650b7219ed9e63725d8
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body and other extracted links suggest a lure related to 'psd nature backgrounds', likely a pretext to encourage clicks. The presence of a 'download button' heuristic further supports the deceptive nature of the document. The primary malicious IOC is the redirector URL.

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/pify?keyword=psd+nature+backgrounds+for+photoshop+free
    • http://gotul.outreachchemistrycloud.com/uploads/1/3/1/4/131407089/zirikajasaju_nuroko_nifoso.pdf
    • http://pilaj.mrfitzbiology.com/uploads/1/3/1/3/131378950/6519025.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/13015919756.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/ielts_answer_sheet_listening.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/metabolic_encephalopathy.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/75818969864.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/59950835335.pdf
    • https://cdn.shopify.com/s/files/1/0448/5994/9218/files/husky_riding_lawn_mower.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5419/files/23628374920.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0434/4931/9577/files/37622600714.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_off00005db3.bin
afd2c014d5e9eb0a0921122df1712fa056973996fd2cdb7376a3ccc1ae98aa14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB3 5424 bytes
font_01_sfnt_off0000700b.bin
97a4bfbc36591b923f2f9c69f1890b6dff85113b997c2a928295306225830ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700B 9924 bytes
font_02_sfnt_off000091f6.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F6 4324 bytes

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