Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3559579149ddabf…

MALICIOUS

PDF

64.8 KB Created: 2020-08-05 04:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c140ae32e89c7c0121d2d7c272f4b51 SHA-1: f8ddfc27a0fa0ceab9f41fdd29877db18fc6b741 SHA-256: e3559579149ddabf69a1d85915b86fdc3acccdc1af814190fd4fb77bc2d6ee24
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to manipulate search engine rankings. One of the primary links, https://ttraff.ru/pify?keyword=cambridge+international+dictionary+of+english+pdf+download+free, is flagged as a malicious redirector. This suggests the document's purpose is to drive traffic to malicious infrastructure by masquerading as a search result for a desirable PDF. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=cambridge+international+dictionary+of+english+pdf+download+free
    • http://tevowani.madrasitekwani.com/uploads/1/3/2/3/132303374/jodanivawonirexe.pdf
    • http://files.erik-myers.com/uploads/1/3/1/0/131069887/sasoga.pdf
    • http://files.bigheadtechnologysolutions.com/uploads/1/3/0/7/130776826/3c94bb5a20b0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gikari.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/devore_probability_and_statistics_9th.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejotoxirebogoro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6115/files/47693559812.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/97059909361.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/79373341570.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/44440599912.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/76498966872.pdf
    • https://cdn.shopify.com/s/files/1/0434/1681/3735/files/seven_sins_gta.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9170/files/jegopuxedowoganega.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/88540413588.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/pilufawekafagejuroxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/voxijusefosabunevoxoden.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000536a.bin
bbcca513c509fd6edda9460e74c2e6fbec864d4bec4ff810d85ad5a2ee12470a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x536A 15536 bytes
font_01_sfnt_off00008607.bin
3eb29b8601becb6988915de0baaa93a3c7e98a788697fc44b35353f5939399c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8607 5808 bytes
font_02_sfnt_off000099a9.bin
b7aa4c49cf54cc7cec4c6dad4bd233e08d98f017e6a7613ce92b5e8388f5987a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A9 9080 bytes
font_03_sfnt_off0000b348.bin
def2e373713800d2aa21ab13772c54162b1feaccedafbbfcf75a8501339ad349		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB348 10024 bytes
font_04_sfnt_off0000d52a.bin
821024dcae0bd0005d85a3909e99575951459e0c4eb03fe35f66f6ea6f63827a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD52A 19264 bytes

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