Malicious PDF — malware analysis report

Static analysis result for SHA-256 165e017923bf0502…

MALICIOUS

PDF

35.0 KB Created: 2020-08-20 08:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ada1382a0e7323b1a9ac239273dd186 SHA-1: 54ae4b1fa60edad0f233926b02100e6584251391 SHA-256: 165e017923bf0502662283c3bd5bdb72b2cf17b380d671576eae68a2038cfb4b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with one identified as a known malicious redirector. The document body also contains the same malicious URL, suggesting an attempt to lure users to a malicious site. The presence of numerous external PDF links further indicates a link farm or redirection scheme.

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.com/pify?keyword=name+ringtone+mahesh
    • http://jajuf.biocompositesgroup.com/uploads/1/3/1/4/131408024/bumosixolelidowoko.pdf
    • http://ravebemit.trekking-romania.net/uploads/1/3/1/4/131407227/lemoxomunulabumaliku.pdf
    • http://wurubuk.urban-conservatory.com/uploads/1/3/1/3/131380213/da6fdd9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/femipizoni.pdf
    • https://cdn.shopify.com/s/files/1/0450/1274/6390/files/wadokosokasob.pdf
    • https://cdn.shopify.com/s/files/1/0436/2957/6352/files/spm_miss_perfect.pdf
    • https://cdn.shopify.com/s/files/1/0444/3809/3990/files/coconut_song_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/gana_achu_sari_sari_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/776949921.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/scholarship_form_maharashtra.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/44269797749.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/supemavokejetijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/cantos_para_novenario_de_difuntos.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/15248735520.pdf
    • https://cdn.shopify.com/s/files/1/0460/7059/5748/files/abstract_wallpaper_4k_free.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e79.bin
2a1d1ed484f517e4b910e0ee0d114c15ff411ece024dc699210956cf17bd65e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E79 5036 bytes
font_01_sfnt_off00005f6f.bin
d4c9572edb9b89038f22ac542efbdf39147e2602f95567f9c4b3231ac25ff227
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6F 9384 bytes