Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94116d835c8302e…

MALICIOUS

PDF

43.5 KB Created: 2020-08-16 20:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c1bba70e61c88cd79aaa525b8e28758 SHA-1: 8e890523c99e19f6906167a058effaf93fb42976 SHA-256: d94116d835c8302ea9f98be7d8d2c8afc4e72861f7bc8db1e3bb7987d572fbb2
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 'present tense of ser and estar worksheet'. This redirector likely leads to further malicious content or exploits. The PDF also contains a large number of links to external PDFs hosted on Shopify, characteristic of a link farm, with the primary purpose of SEO manipulation or distributing malicious content. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly suggests a phishing or social engineering 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.cc/pify?keyword=present+tense+of+ser+and+estar+worksheet
    • http://sidinaruf.joelsheridan.com/uploads/1/3/2/7/132740249/vikudopinar_rozuragimarota_beluwijidewij_vuzusidekuxa.pdf
    • http://files.mirrorimagemissions.com/uploads/1/3/0/8/130814758/xilibodofanogob.pdf
    • http://files.covenantsouthfield.org/uploads/1/3/1/3/131398134/xalematenaj.pdf
    • http://nemapa.taehohwang.com/uploads/1/3/1/0/131070872/netititejan.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/norusarabuwabifaluzud.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/zilean_aram_build.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/89247276993.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0115/files/daputefodijijunupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/avatharam_video_songs_hd.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1541/files/walking_dead_comic.pdf
    • https://cdn.shopify.com/s/files/1/0435/4854/1087/files/age_discrimination_act_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6526/9669/files/giwexupebunuletojeroke.pdf
    • https://cdn.shopify.com/s/files/1/0440/7279/6325/files/badupijufikusevopaweli.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_off00006cfe.bin
9becbbc898447fc52890f2600a908d8bf7083e9208ab7f4cb2806f87218cd3a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFE 5120 bytes
font_01_sfnt_off00007e72.bin
dce3ed7ef5a59a2da49b40c4646041f77b6014ab2e39bb4a56dff525ee95aa24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E72 10260 bytes

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