Malicious PDF — malware analysis report

Static analysis result for SHA-256 403004d25d5c514c…

MALICIOUS

PDF

122.7 KB Created: 2020-08-08 09:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82625440036f0fa95a7932c7e8163420 SHA-1: e2bdcb0ca43e71b890796de7e50ebe75203283df SHA-256: 403004d25d5c514cbbcbd44defbabce2917f3769435420e4835e964a0b862693
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Bacaan yasin dan tahlil pdf'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious site. The PDF structure and link farm suggest a campaign focused on SEO poisoning to distribute 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.com/pify?keyword=bacaan+yasin+dan+tahlil+pdf
    • http://files.markochdance.com/uploads/1/3/1/4/131453086/15cf064d.pdf
    • http://files.monakansoh.com/uploads/1/3/0/7/130738993/1323047.pdf
    • http://files.akrowsnest.com/uploads/1/3/0/9/130969352/modegug.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1085/files/jetogoxodikugegemonu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9728/5027/files/55054954443.pdf
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/31936373392.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/dikizotakubokoxura.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/samsung_galaxy_s10_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/98264158999.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/vawozenirapovufupuxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/44276914906.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/kaufland_letk_ostrava.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/juwunul.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/87670240121.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/nizapolenafunaxugor.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
stream_005_off0001a31f.bin
51f757b611575d609799adcd5f4314e41b5f5423384cec7c1bbca0481d03ff1e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A31F 33392 bytes
font_00_sfnt_off00016d69.bin
7c0b0cb3c091d545ba79d1e3e61bbaff96c67a9c50f317f38396eec5feb7e423
pdf-font-stream PDF embedded font (sfnt) at offset 0x16D69 5296 bytes
font_01_sfnt_off00017f7a.bin
e318448409316251447de6c3b3d1b033f424bbfeea1cc430e812b29f82495865
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F7A 10504 bytes